Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
integration schemes » irrigation schemes, integration some
tools integration » tool integration, trade integration, modal integration
grid integration » trade integration, _ integration, data integration
support grid » support agri, support grant, support group

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

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