Ok, thanks for your response. I tried search by postal code and its works now. But there another question.
I need to save location data into database so use for id`s geonamesId. But postal code not return geoname id, only search method can do that. So now each time when user wants to find city by postal code its 2 steps:
1. User types Country+postalcode and use postalCodeSearch method.
2. I getting data from response and do second query and search method with country+placeName+adminName.
In the result I have city name, region name and geonameId. But there couple problems exists. Some data can be lost, because search method not always return same result as postal code search. And 2 queries works slower than one.
So maybe exists some method that can give possibility to find city name by country+postalCode and will return placeName, adminName and geonameId?