Perhaps you should try some spelling variations:
zheng doug » zeng doug, zheng rong, zheng cong
yan liang » yang liang, wang liang, you liang
doug ping » dong ping, dou peng
dan yang » daun yang, tan yang, wang yang
yan guan » gan guan, yan yuan, yang guang
yu zheng » yu cheng, yu zhong, _ zheng
dong di » dong sin
ping yu » ming yu, ping ku, ping yi
wang » wing, wan, lang

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 yan) OR (dong di)) ((((dan yang) OR (yan guan))) OR (yan liang)) ping yu zheng doug ping ;~.
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (dong di)) ((((dan yang) or (yan guan))) or (yan liang)) ping yu zheng doug ping ;*.