Perhaps you should try some spelling variations:
international power » international poverty, international ports, international panel
aid conservation » land conservation, bird conservation, wild conservation
export time » port time, export regime, exposure time
supply aid » supply asia, supply a, supply ann
export die » exporte die, export day, export fdi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply aid conservation efforts. ) OR ( ((export time) OR (export die)) international power. ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( supply aid conservation efforts. ) or ( ((export time) OR (export die)) international power. ))~".
• Adding a wildcard symbol may retrieve word variants: (( supply aid conservation efforts. ) or ( ((export time) OR (export die)) international power. ))*.