Search the listings using the states/provinces field. This search box is populated with the states/provinces dynamically generated from states/provinces with listings listed in them. Whichever state appears in the dropdown is an actual state that a listing is located in.. If the state is not in the list there is no use searching for listings in that state.
Results are returned if they match the condition of your search text statement and having this state/province or if only a state/province is chosen then every listing within that state is returned.