Perhaps you should try some spelling variations:
integration schengen » integration changed, integration schemes, integration challenges
integration theory » integration through, information theory, innovation theory
grant integration » migrant integration, migrants integration, statt integration
support eu » support _, support a, support 5
support 4 » support _, support a, support 3.4

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((support eu) OR (support 4)) integration theory. ) or ( support grant integration schengen. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((support eu) OR (support 4)) integration theory. ) OR ( support grant integration schengen. )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((support eu) OR (support 4)) integration theory. ) or ( support grant integration schengen. ))".
• Adding a wildcard symbol may retrieve word variants: (( ((support eu) OR (support 4)) integration theory. ) or ( support grant integration schengen. ))*.