Perhaps you should try some spelling variations:
chen yugang » chen huigang, chen yang, chen yulan
ying tong » xin tong
ying yang » yang yang, yin yang, ying chang
yan yuan » yan guan, fang yuan, yan clan
yuan hua » tuan hua, yuan hui, tan hua
hua chen » jui chen, yu chen, a chen
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 yuan hua chen yugang ((ying tong) OR (ying yang)) hui ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nan yan yuan hua chen yugang ((ying tong) OR (ying yang)) hui ;*".