Perhaps you should try some spelling variations:
rent sharing » risk sharing, rent seeking, cost sharing
sharing oil » sharing our, sharing big, sharing his
yang yang » wang yang
hua rent » hua ren
oil ying » oil using, oil line
ying hua » ming hua, wang hua, ying zhu
yi hua » li hua, ya hua, yi hui

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (wang yan)) yi hua rent sharing oil ying hua ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (wang yan)) yi hua rent sharing oil ying hua ;*.