Perhaps you should try some spelling variations:
"import price integration theory." » "import price integration through.", "import price information theory.", "import price innovation theory.", "import service integration theory.", "import trade integration theory.", "import price indexation theory.", "import prices integration theory.", "export price integration theory.", "export prices integration theory."
"support agri integration social." » "support agri international social.", "support grid integration social.", "support der integration social.", "support iii integration social.", "support aging integration social.", "support a integration social."

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

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