Perhaps you should try some spelling variations:
chen yugang » chen huigang, chen yang, chen yulan
yugang ying » huang ying
yan clan » das clan, yan guan, yan yuan
clan hua » tan hua, tuan hua
hua chen » jui chen, yu chen, a chen
wang hui » wang zhi, wang wei, wang he
nan yan » nan ya, wang yan, qian yan

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

• Performing a fuzzy search may retrieve terms with similar spellings: nan yan clan hua chen yugang ying ((tong hui) or (((wang hui) OR (wang hua)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nan yan clan hua chen yugang ying ((tong hui) OR (((wang hui) OR (wang hua)))) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nan yan clan hua chen yugang ying ((tong hui) or (((wang hui) OR (wang hua)))) ;*".