Perhaps you should try some spelling variations:
quan guan » quan guo, yan guan
gang dong » gang gong, gang sung, jeng dong
yan yuan » yan guan, fang yuan, nan yan
gan guan » yan guan, fan guon, gui guan
wai yan » wang yan, wei yang
yi gang » ii gang, i gang, li gang
sin » sign, sind, skin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wai yan) or (dong di)) ((yan yuan) or (((gan guan) OR (quan guan)))) ming yi gang dong sin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wai yan) OR (dong di)) ((yan yuan) OR (((gan guan) OR (quan guan)))) ming yi gang dong sin ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wai yan) or (dong di)) ((yan yuan) or (((gan guan) OR (quan guan)))) ming yi gang dong sin ;*".