Perhaps you should try some spelling variations:
quan guan » gan guan, quan guo
gang sung » gang und, gang gong, hung sung
yan guan » gan guan, yan yuan, yang guang
sung sin » sung sisi, dong sin, sung un
wai yan » wang yan, wei yang
dong di » dong sin
ming i » ming yi, ming _, ming a
i gang » ii gang, li gang, yi gang

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 guan) or (quan guan)) ming i gang sung sin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wai yan) OR (dong di)) ((yan guan) OR (quan guan)) ming i gang sung sin ;*.