Perhaps you should try some spelling variations:
young mining » young marine, png mining
wang young » wang hyoung, wang yong, kang young
mining hua » mining a, ming hua, mining china
yang vinh » yang jin, sang minh, yang jing
yang jun » yang jui, pang jun, yang jin
hua ren » hua chen
long du » long d, long do, long run

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: wang young mining hua ren ((yang vinh) OR (yang jun)) ((long du) OR (cong shu)) ;~.
• Adding a wildcard symbol may retrieve word variants: wang young mining hua ren ((yang vinh) or (yang jun)) ((long du) or (cong shu)) ;*.