Perhaps you should try some spelling variations:
"support state integration theories." » "support state integration theory.", "support state integration through.", "support state integration efforts.", "support system integration theories.", "support state interactions theories.", "support trade integration theories.", "support staff integration theories.", "support strategy integration theories.", "support estimate integration theories."
"support field lending services." » "support field nonlending services.", "support field planning services.", "support field banking services.", "support falls lending services.", "support self lending services.", "support field testing services.", "support firm lending services.", "support tier lending services."

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("support state integration theories.") OR ("support field lending services."))~.
• Removing quotes may allow a broader search: (( support state integration theories. ) or ( support field lending services. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support state integration theories.") or ("support field lending services."))*.