Perhaps you should try some spelling variations:
"support grant integration theories." » "support grant integration theory.", "support grant integration through.", "support grant integration efforts.", "support migrant integration theories.", "support trade integration theories.", "support grid integration theories."
"supply water integration schemes." » "supply water irrigation schemes.", "supply water integration some.", "supply water integrating schemes.", "supply factor integration schemes.", "supply data integration schemes."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("support grant integration theories.") OR ("supply water integration schemes."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"support grant integration theories.\") OR (\"supply water integration schemes.\"))*".
• Removing quotes may allow a broader search: (( support grant integration theories. ) OR ( supply water integration schemes. ))*.