Perhaps you should try some spelling variations:
gang dong » gang gong, gang sung, jeng dong
yan yuan » yan guan, fang yuan, nan yan
gan guan » yan guan, quan guan, fan guon
wan yan » wang yan, nan yan, wai yan
ping yi » ming yi, jiang yi, ping jia
ping yu » ming yu, ping ku
sin » sign, sind, skin

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: ((wan yan) OR (dong di)) ((yan yuan) OR (gan guan)) ((ping yi) OR (ping yu)) gang dong sin ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wan yan) or (dong di)) ((yan yuan) or (gan guan)) ((ping yi) OR (ping yu)) gang dong sin ;~".
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (dong di)) ((yan yuan) or (gan guan)) ((ping yi) OR (ping yu)) gang dong sin ;*.