Perhaps you should try some spelling variations:
interaction series » interactions series, interaction studies, interaction terms
irrigation schemes » irrigation scheme, irrigation systems
trade interaction » trade integration, face interaction, time interaction
chain irrigation » grain irrigation, change irrigation, basin irrigation
supply trade » supply case

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 interaction series. ) or ( supply chain irrigation schemes. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply trade interaction series. ) OR ( supply chain irrigation schemes. )).
• Adding a wildcard symbol may retrieve word variants: (( supply trade interaction series. ) or ( supply chain irrigation schemes. ))*.