Perhaps you should try some spelling variations:
integration theorems » integration theories, integration theory, integrationstheorie 2
integration efforts » international efforts, conservation efforts
de integration » die integration, re integration, une integration
supply trade » supply case
supply de » supply _, supply a, supply 3

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

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