Perhaps you should try some spelling variations:
china's rules » china's roles, china's role, china rules
rules mining » rule mining, rules making, mines mining
mining case » finding case, mining based, mining lease
3 china's » _ china's
dong ping » dong bin, dong jung, dong yang
eung » yeung, seung, leung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong sin) or (((dong ping) or (wang yan)))) 3 china's rules mining case eung skin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong sin) OR (((dong ping) OR (wang yan)))) 3 china's rules mining case eung skin ;.
• Adding a wildcard symbol may retrieve word variants: ((dong sin) or (((dong ping) or (wang yan)))) 3 china's rules mining case eung skin ;*.