Perhaps you should try some spelling variations:
yan yuan » fang yuan, yan clan, yan kun
yan guan » gan guan, yang guang, yihan guan
kong eiu » tonga eiu
wan yan » wang yan, wai yan, wang yang
dong di » dong sin
nan yan » nan ya, wang yan, qian yan
ping ku » ping ke, ping yu
ku hong » hu hong, ky hong, kia hong

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 (nan yan))) OR (yan guan)) ping ku hong kong eiu ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (dong di)) ((((yan yuan) or (nan yan))) or (yan guan)) ping ku hong kong eiu ;*.