Perhaps you should try some spelling variations:
zhang yuqing » zhang yuqin, zhang yunling, zhang ying
jane cheng » tan cheng
joon chang » hoong chang, boon chong, jin chang
jane chen » jean chen, jie chen, kang chen
yang joon » kyung joon, yang jin, yang jun
tan yang » dan yang, tan ying, tan yong
chang ha » chang mae

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

• Performing a fuzzy search may retrieve terms with similar spellings: zhang yuqing ((jane chen) or (jane cheng)) tan yang joon chang ha ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: zhang yuqing ((jane chen) OR (jane cheng)) tan yang joon chang ha ;*.