Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung vap » trung cap, trung va, trung van
vap nhung » va nhung, ve nhung, voi nhung
chi sang » chi lang, chieu sang, chi chang
cong dan » cong san, cong tan, huong dan
cong tac » cong ty
than ban » thanh ban, toan ban, than man
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sang - thanh trung vap nhung ((cong dan) or (cong tac)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sang - thanh trung vap nhung ((cong dan) OR (cong tac)) than ban.
• Adding a wildcard symbol may retrieve word variants: doi chi sang - thanh trung vap nhung ((cong dan) or (cong tac)) than ban*.