Perhaps you should try some spelling variations:
mining cong » mining coal, mining china, mining costs
wang tan » wang yan, wang ban, wang dan
tan yang » dan yang, tan ying, tan yong
a mining » sea mining, a missing, a mini
li lu » li ju, li wu, yi lu
li li » li lin, li yi
li l » li _, i l, l l

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 tan yang ((li lu) OR (((li li) OR (li l)))) a mining cong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang tan yang ((li lu) or (((li li) OR (li l)))) a mining cong shu ;~".
• Adding a wildcard symbol may retrieve word variants: wang tan yang ((li lu) or (((li li) OR (li l)))) a mining cong shu ;*.