Perhaps you should try some spelling variations:
integrating policies » integration policies, integrated policies, integrating positive
integration theory » integration through, information theory, innovation theory
pipes integrating » cities integrating, gaps integrating, ims integrating
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: (( supply pipes integrating policies. ) or ( import trade integration theory. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply pipes integrating policies. ) OR ( import trade integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (( supply pipes integrating policies. ) or ( import trade integration theory. ))*.