Perhaps you should try some spelling variations:
integration theories » integration through, integration efforts, integration reforms
integration theory » integration through, information theory, integration report
water integration » water integrating, factor integration, data integration
fare integration » market integration, trade integration, data integration
export fare » export share, export base, export more

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( export fare integration theories. ) or ( supply water integration theory. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( export fare integration theories. ) OR ( supply water integration theory. )).
• Adding a wildcard symbol may retrieve word variants: (( export fare integration theories. ) or ( supply water integration theory. ))*.