Perhaps you should try some spelling variations:
migrant integration » market integration
irrigation schemes » irrigation scheme, irrigation systems
integration power » integrative power, integration process, international power
support migrant » support migrants, support grant, supporting migrants
import scale » import share, import sales, import shares

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( import scale irrigation schemes. ) or ( support migrant integration power. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( import scale irrigation schemes. ) OR ( support migrant integration power. )).
• Adding a wildcard symbol may retrieve word variants: (( import scale irrigation schemes. ) or ( support migrant integration power. ))*.