Perhaps you should try some spelling variations:
sharing mining » sharing during, sharing learning
rent sharing » risk sharing, rent seeking, cost sharing
mining cong » mining coal, mining china, mining costs
wang yang » wang yan, wang liang, wang yanling
dong nan » dong yang, dong sin, dong bin
hua rent » hua ren

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong nan) or (wang yang)) ya hua rent sharing mining cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong nan) OR (wang yang)) ya hua rent sharing mining cong shu ;.
• Adding a wildcard symbol may retrieve word variants: ((dong nan) or (wang yang)) ya hua rent sharing mining cong shu ;*.