Perhaps you should try some spelling variations:
mining planning » training planning, planning planning, meetings planning
planning chain » planning china, planning can, planning gain
china pei » china pim, china pt, china peilei
china peo » china pim, china pt
yang jun » pang jun, yang jin, yang judy
yang jui » yang judy, yang di, yang xi
tan » than

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 chain ((china pei) OR (china peo)) ((yang jun) OR (yang jui)) hong tan ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "mining planning chain ((china pei) OR (china peo)) ((yang jun) or (yang jui)) hong tan ;~".
• Adding a wildcard symbol may retrieve word variants: mining planning chain ((china pei) OR (china peo)) ((yang jun) or (yang jui)) hong tan ;*.