Perhaps you should try some spelling variations:
"support migrant integration theories." » "support migrant integration theory.", "support migrant integration through.", "support migrant integration efforts.", "support market integration theories.", "support mitrade integration theories.", "support migrid integration theories.", "support miurban integration theories."
"support grant integration series." » "support grant integrating services.", "support grant integration schemes.", "support grant integration social.", "support trade integration series.", "support grid integration series.", "support urban integration series."

Try widening your search to All Fields.

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 series.") or ("support migrant integration theories."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("support grant integration series.") OR ("support migrant integration theories.")).
• Removing quotes may allow a broader search: (( support grant integration series. ) or ( support migrant integration theories. )).
• Adding a wildcard symbol may retrieve word variants: (("support grant integration series.") or ("support migrant integration theories."))*.