Perhaps you should try some spelling variations:
"supply social integration schemes." » "supply social integration schengen.", "supply social irrigation schemes.", "supply social integration regimes.", "supply global integration schemes.", "supply financial integration schemes.", "supply regional integration schemes."
"survey sector integration series." » "survey sector integration services.", "survey sector interaction series.", "survey sector integration server.", "survey section integration series.", "surveys section integration series.", "survey second 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: (("survey sector integration series.") or ("supply social integration schemes."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("survey sector integration series.") OR ("supply social integration schemes."))*.
• Removing quotes may allow a broader search: (( survey sector integration series. ) or ( supply social integration schemes. ))*.