Perhaps you should try some spelling variations:
"support tool integration theories." » "support tool integration theorems.", "support tool integrationstheorie 2.", "support tool integration theory.", "support global integration theories.", "support 3 integration theories.", "support national integration theories.", "support tools integration theories."
"support social integration theories." » "support social integration theorems.", "support social integrationstheorie 2.", "support social integration theory.", "support global integration theories.", "support financial integration theories.", "support regional integration theories.", "supporting social integration theories.", "supply social integration theories."

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

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