Perhaps you should try some spelling variations:
yan guan » gan guan, yan yuan, yang guang
guan hua » tuan hua, gui hua, tan hua
yang yun » yang jun, tang yun, yang yue
wong yue » wang yue, hong yu
hong hai » shang hai, zhong tai, dang hai
wai yan » wang yan, wei yang
yang yi » yang di, yang jui
yang xi » yang di, yang jui

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: wai yan guan hua ban ((((yang yi) OR (yang xi))) OR (((yang yun) OR (wong yue)))) hong hai ;~.
• Adding a wildcard symbol may retrieve word variants: wai yan guan hua ban ((((yang yi) or (yang xi))) or (((yang yun) or (wong yue)))) hong hai ;*.