Perhaps you should try some spelling variations:
international worker » international workers, international work, international working
international based » international case, international cases, international basic
worker economic » world economic, turkey economic, soccer economic
economy fierce » economy finance, economy field, economy figure
based economy » closed economy, mixed economy

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( international worker economic theory ) OR ( international based economy fierce ))~.
• Adding a wildcard symbol may retrieve word variants: (( international worker economic theory ) or ( international based economy fierce ))*.