Perhaps you should try some spelling variations:
international regime » international regimes, international rice, international relief
interaction series » interactions series, interaction studies, interaction terms
den international » den internationalen, when international, can international
u.s interaction » 3.2 interaction, 3.1 interaction, 2.1 interaction
supply u.s » supply 1.3, supply 2.3, supply 3.3
supply den » supply ann, supply demand, supply design

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 u.s interaction series. ) OR ( supply den international regime. ))~.
• Adding a wildcard symbol may retrieve word variants: (( supply u.s interaction series. ) or ( supply den international regime. ))*.