Perhaps you should try some spelling variations:
zhang yuqing » zhang yuqin, zhang yunling, zhang ying
boon chong » boon siong, joon chang
tan cheng » tang zheng, yuan cheng, tan hong
jian yang » qian yan, dan yang, jia fang
yang boon » ong boon
tan chen » ta chen, jane chen, jean chen
chong ha » chang ha, chong nam, chong wan

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "zhang yuqing ((tan chen) OR (tan cheng)) jian yang boon chong ha ;~".
• Adding a wildcard symbol may retrieve word variants: zhang yuqing ((tan chen) OR (tan cheng)) jian yang boon chong ha ;*.