Perhaps you should try some spelling variations:
wang liang » wang yang
liang ying » liang liying, huang ying, zhang ying
rent gang » den gang, deng gang
ying oil » big oil, ying jin
oil rent » oil rents, oil trend, oil real
gang li » gan li, tang li, wang li
hong yu » wong yue

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang ying oil rent gang li ((hong tan) or (hong yu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang ying oil rent gang li ((hong tan) OR (hong yu)) ;.
• Adding a wildcard symbol may retrieve word variants: wang liang ying oil rent gang li ((hong tan) or (hong yu)) ;*.