Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
interaction series » interactions series, interaction studies, interaction terms
donor integration » der integration, cover integration, einer integration
case interaction » cases interaction, based interaction, scale interaction
supply donor » supply food
supply case » supply cost, supply chain, supply curve

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

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