Perhaps you should try some spelling variations:
"support care integration theories." » "support care integration theory.", "support care integration through.", "support care integration efforts.", "support fare integration theories.", "support can integration theories.", "support market integration theories.", "support carbon integration theories.", "support state integration theories.", "support trade integration theories."
"support deep irrigation schemes." » "support deep irrigation scheme.", "support deep irrigation systems.", "support drip irrigation schemes.", "support level irrigation schemes.", "support crop irrigation schemes.", "support does irrigation schemes.", "support them irrigation schemes.", "support data irrigation schemes."

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support care integration theories.\") OR (\"support deep irrigation schemes.\"))~".
• Removing quotes may allow a broader search: (( support care integration theories. ) OR ( support deep irrigation schemes. ))~.
• Adding a wildcard symbol may retrieve word variants: (("support care integration theories.") OR ("support deep irrigation schemes."))*.