Perhaps you should try some spelling variations:
yihan guan » yan guan
gang sung » gang und, gang gong, hung sung
wei yang » pei yang, wei wang, wei yang's
gan guan » yan guan, quan guan, fan guon
sung sin » sung sisi, dong sin, sung un
wai yan » wang yan
dong di » dong sin
yi gang » ii gang, i gang, li 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 (wei yang))) or (dong di)) ((yihan guan) or (gan guan)) ming yi gang sung sin ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wai yan) OR (wei yang))) OR (dong di)) ((yihan guan) OR (gan guan)) ming yi gang sung sin ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wai yan) OR (wei yang))) or (dong di)) ((yihan guan) or (gan guan)) ming yi gang sung sin ;*".