Perhaps you should try some spelling variations:
shallow international » how international, shallow integration, all international
international poverty » national poverty
canal irrigation » scale irrigation
support canal » support can, support data, support bank
systems. » system.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply shallow international poverty. ) or ( support canal irrigation systems. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply shallow international poverty. ) OR ( support canal irrigation systems. )).
• Adding a wildcard symbol may retrieve word variants: (( supply shallow international poverty. ) or ( support canal irrigation systems. ))*.