Perhaps you should try some spelling variations:
integration theories » integration theory, integration through, integration efforts
fare integration » market integration, trade integration, data integration
refunds banking » reforms banking, round banking
export refunds » export fund
import fare » import share, import market, import value
services. » series.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( import fare integration theories. ) or ( export refunds banking services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( import fare integration theories. ) OR ( export refunds banking services. )).
• Adding a wildcard symbol may retrieve word variants: (( import fare integration theories. ) or ( export refunds banking services. ))*.