Perhaps you should try some spelling variations:
multiple options » multiple locations, multiple positions, multiple solutions
options research » actions research, optics research, operations research
action research » national research
multi action » multi actor, multi option, multi location
july 2012 » july 2013
july 2007 » july 2008, july 2013, july 2020

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: (( multi action research : july 2012 ) OR ( multiple options research : july 2007 ))~.
• Adding a wildcard symbol may retrieve word variants: (( multi action research : july 2012 ) or ( multiple options research : july 2007 ))*.