Perhaps you should try some spelling variations:
"supply costs integration theories." » "supply costs integration theorems.", "supply costs integrationstheorie 2.", "supply costs integration theory.", "supply comes integration theories.", "supply post integration theories.", "supply focus integration theories."
"supply curve integration series." » "supply curve integration services.", "supply curve interaction series.", "supply curve integration server.", "supply care integration series.", "supply burke integration series.", "supply curvello 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 costs integration theories.") or ("supply curve integration series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("supply costs integration theories.") OR ("supply curve integration series."))*.
• Removing quotes may allow a broader search: (( supply costs integration theories. ) or ( supply curve integration series. ))*.