Perhaps you should try some spelling variations:
"import data integration theories." » "import data integration theory.", "import data integration through.", "import data integration efforts.", "import trade integration theories.", "import _ integration theories.", "import data integrity theories.", "import duty integration theories."
"supply water integration series." » "supply water integrating services.", "supply water integration schemes.", "supply water integration social.", "supply water integrating series.", "supply factor integration series.", "supply fare integration series."

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

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