Perhaps you should try some spelling variations:
young mining » young marine, png mining
mining hua » mining a, ming hua, mining china
wan young » way young, wang hyoung, kang young
hua rene » hua ren, juan rene
rene yan » ren yan, rene ten, see yan
jiu gong » jiu cong, wu gong
liu gang » liu gangs, liu yang, li gang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wan young mining hua rene yan ((jiu gong) or (liu gang)) hui ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wan young mining hua rene yan ((jiu gong) OR (liu gang)) hui ;*.