Google Maps API -is not showing all cities - google-maps

Question

I would like to use Google Maps API to find all cities contains entered name.
I tried to use:
https://maps.googleapis.com/maps/api/place/autocomplete/json?&input=Poznań&types=(cities)&language=pl&key=[MyKey]
This request returned 5 cities:
"Poznań, Polska"
"Poznanovec, Chorwacja",
"Poznań, Obwód rówieński, Ukraina"
"Poznanovci, Słowenia"
"Sady, Polska"
Two problems:
Query don't return one of city Poznań in Poland (https://goo.gl/maps/B3LjyRdVn7S3DEuu7)
I don't know why query return: "Sady, Polska"
Could you tell me how force API to return all cities contains some name?
Full query return:
{
"predictions" : [
{
"description" : "Poznań, Polska",
"matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"place_id" : "ChIJtwrh7NJEBEcR0b80A5gx6qQ",
"reference" : "ChIJtwrh7NJEBEcR0b80A5gx6qQ",
"structured_formatting" : {
"main_text" : "Poznań",
"main_text_matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"secondary_text" : "Polska"
},
"terms" : [
{
"offset" : 0,
"value" : "Poznań"
},
{
"offset" : 8,
"value" : "Polska"
}
],
"types" : [ "locality", "political", "geocode" ]
},
{
"description" : "Poznanovec, Chorwacja",
"matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"place_id" : "ChIJMduuD-nmZUcRKLHqfF4Ty0w",
"reference" : "ChIJMduuD-nmZUcRKLHqfF4Ty0w",
"structured_formatting" : {
"main_text" : "Poznanovec",
"main_text_matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"secondary_text" : "Chorwacja"
},
"terms" : [
{
"offset" : 0,
"value" : "Poznanovec"
},
{
"offset" : 12,
"value" : "Chorwacja"
}
],
"types" : [ "locality", "political", "geocode" ]
},
{
"description" : "Poznań, Obwód rówieński, Ukraina",
"matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"place_id" : "ChIJM8yYp2JZKEcRROf2JFonEiA",
"reference" : "ChIJM8yYp2JZKEcRROf2JFonEiA",
"structured_formatting" : {
"main_text" : "Poznań",
"main_text_matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"secondary_text" : "Obwód rówieński, Ukraina"
},
"terms" : [
{
"offset" : 0,
"value" : "Poznań"
},
{
"offset" : 8,
"value" : "Obwód rówieński"
},
{
"offset" : 25,
"value" : "Ukraina"
}
],
"types" : [ "locality", "political", "geocode" ]
},
{
"description" : "Poznanovci, Słowenia",
"matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"place_id" : "ChIJs5Z1s_IXb0cRGcz67oYV9SA",
"reference" : "ChIJs5Z1s_IXb0cRGcz67oYV9SA",
"structured_formatting" : {
"main_text" : "Poznanovci",
"main_text_matched_substrings" : [
{
"length" : 6,
"offset" : 0
}
],
"secondary_text" : "Słowenia"
},
"terms" : [
{
"offset" : 0,
"value" : "Poznanovci"
},
{
"offset" : 12,
"value" : "Słowenia"
}
],
"types" : [ "locality", "political", "geocode" ]
},
{
"description" : "Sady, Polska",
"matched_substrings" : [
{
"length" : 4,
"offset" : 0
}
],
"place_id" : "ChIJ-TKnSCVHBEcRGR5C_UOhHhY",
"reference" : "ChIJ-TKnSCVHBEcRGR5C_UOhHhY",
"structured_formatting" : {
"main_text" : "Sady",
"main_text_matched_substrings" : [
{
"length" : 4,
"offset" : 0
}
],
"secondary_text" : "Polska"
},
"terms" : [
{
"offset" : 0,
"value" : "Sady"
},
{
"offset" : 6,
"value" : "Polska"
}
],
"types" : [ "locality", "political", "geocode" ]
}
],
"status" : "OK"
}

Answer 1

You can add components parameter to guarantee that the results of the Places Autocomplete API will be restricted to a certain country.
Here's a working example:
https://maps.googleapis.com/maps/api/place/autocomplete/json?&input=Poznań&types=(cities)&components=country:PL&key=YOUR_API_KEY
There,Poznań, Poland is in the result, and no Sady, Polska.