I think this is a bug and I\'m going to find out where to submit it to Google but I figured I\'d ask here first in case I\'m just doing something wrong or misinterpreting someth
From the documentation:
Note that biasing only prefers results for a specific domain; if more relevant results exist outside of this domain, they may be included.
To restrict the results to a specific country use Component Filtering
e.g. https://maps.googleapis.com/maps/api/geocode/json?address=manchester&components=country:US