Perhaps you should try some spelling variations:
mining planning » training planning, planning planning, meetings planning
planning spain » planning chain, planning gain, planning space
china pim » china peo, china pt
yang jie » yang di, yang xi, yang yi
yang jin » yang jun, ying jin, shang jin
yang jui » yang judy, yang di, yang xi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: mining planning spain china pim ((((yang jie) OR (yang jin))) OR (yang jui)) hong (tan OR than) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mining planning spain china pim ((((yang jie) OR (yang jin))) or (yang jui)) hong (tan or than) ;~".
• Adding a wildcard symbol may retrieve word variants: mining planning spain china pim ((((yang jie) OR (yang jin))) or (yang jui)) hong (tan or than) ;*.