Perhaps you should try some spelling variations:
knowing about » known about, know about, knowing your
zhang daem » zhang dai, than daem
guang ying » huang ying, huang jing, huang ting
bin zhang » binh thang, li zhang, jia zhang
huang bin » huang lin, huang jing, huang ting
guan wei » hua wei, guan li, han wei

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

• If you are trying to use Boolean operators, they must be ALL CAPS: bin zhang daem guan wei ((guang ying) OR (huang bin)) knowing about ;~.
• Adding a wildcard symbol may retrieve word variants: bin zhang daem guan wei ((guang ying) or (huang bin)) knowing about ;*.