Perhaps you should try some spelling variations:
cheng guan » cheng han, thong guan
cheng tan » cheng han, chen tan, cheung tai
wong shiu » wong siu, cong shu, wong sau
lang a » lang 3, lang _, erlang a
a fang » ta fang, _ fang, a fan
fang 2 » fang _, fang a
2 chin » 2 china, 2 chain, _ chin
shin » skin, sein, thin

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang a fang 2 chin ((cheng tan) or (cheng guan)) ((wong shiu) OR (song shin)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang a fang 2 chin ((cheng tan) OR (cheng guan)) ((wong shiu) OR (song shin)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang a fang 2 chin ((cheng tan) or (cheng guan)) ((wong shiu) OR (song shin)) ;*".