Perhaps you should try some spelling variations:
assistance customs » assistance customer, assistance history, assistance lessons
scale development » estate development, trade development, sme development
female employment » self employment, wage employment, farm employment
employment water » employment rate, employment rates, employment wages

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( scale development assistance customs. ) or ( female employment water schemes. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( scale development assistance customs. ) OR ( female employment water schemes. )).
• Adding a wildcard symbol may retrieve word variants: (( scale development assistance customs. ) or ( female employment water schemes. ))*.