Perhaps you should try some spelling variations:
integration theories » integration theorems, integrationstheorie 2, integration theory
"supply _ integration efforts." » "supply _ international efforts.", "supply _ conservation efforts."
support grid » support agri, support grant, support group
supply grid » supply crowd, supply great

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

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