Perhaps you should try some spelling variations:
integration theory » integration through, information theory, innovation theory
integration social » international social
fare integration » die integration
support fare » support farm, support farmers, support future
import trade » export trade, import price, import taxes

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( support fare integration theory. ) or ( import trade integration social. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( support fare integration theory. ) OR ( import trade integration social. )).
• Adding a wildcard symbol may retrieve word variants: (( support fare integration theory. ) or ( import trade integration social. ))*.