Perhaps you should try some spelling variations:
cheng zhang » cheng han, zhen zhang, chen zheng
chen zhang » zhen zhang, chen zheng, chen shuang
hong gang » gong gang, hong wang, hong kong
xin jeong » min jeong, kin keong, xin tong
jeong 情 » jeong _, jeongui 情, jeong mi
gang yan » wang yan, gang yao, wang yang
yan yi » yang yi, tan yi, yan zi

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

• Performing a fuzzy search may retrieve terms with similar spellings: hong gang yan yi ((chen zhang) or (cheng zhang)) xin jeong 情 ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hong gang yan yi ((chen zhang) OR (cheng zhang)) xin jeong 情 ;*.