Perhaps you should try some spelling variations:
chen yugang » chen huigang, chen yang, chen yulan
binh thang » binh thanh, bin zhang, binh thuan
yang xi » yang jui
yang yi » yang jui
thang c » chang c, anhang c, thang vo
z chen » _ chen, a chen, n chen
lp a » lpg a, nlp a, up a
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 (yang di))) OR (((yang xi) OR (yang yi))))lp a z chen yugang binh thang c ;~.
• Adding a wildcard symbol may retrieve word variants: ((((wang yan) or (yang di))) or (((yang xi) or (yang yi))))lp a z chen yugang binh thang c ;*.