Perhaps you should try some spelling variations:
"support from integration theories." » "support from integration theory.", "support from integration through.", "support from integration efforts.", "support grid integration theories.", "support fare integration theories.", "support from immigration theories."
"support tool integration theories." » "support tool integration theory.", "support tool integration through.", "support tool integration efforts.", "support global integration theories.", "support social integration theories.", "support trade integration theories.", "support tools integration theories."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support from integration theories.") OR ("support tool integration theories."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support from integration theories.\") OR (\"support tool integration theories.\"))".
• Removing quotes may allow a broader search: (( support from integration theories. ) OR ( support tool integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support from integration theories.") OR ("support tool integration theories."))*.