Perhaps you should try some spelling variations:
wang dong » wang yong, wang hong, wang yang
dong yang » dong hoang, wang yang, yang yang
rent plan » et plan, current plan
yang oil » yang zili, yang di, yang xi
oil rent » oil rents, oil trend, oil real
wong yue » wang yue, hong yu
plan li » plan la, plan les, plan als

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang dong yang oil rent plan li ((dang hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang dong yang oil rent plan li ((dang hai) OR (wong yue)) ;.
• Adding a wildcard symbol may retrieve word variants: wang dong yang oil rent plan li ((dang hai) or (wong yue)) ;*.