Perhaps you should try some spelling variations:
thanh tung » thanh cong
duong manh » duong van
hieu lang » chieu sang, hieu quang, nhieu tang
nong manh » nong lanh, hoang manh, luong manh
doi hieu » doi chieu, doc hieu, doi hien
van hang » van khang, van hoang, van thang
toan ban » van ban
va hang » va nang, va lang, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh tung ((va hang) or (van hang)) ((nong manh) or (duong manh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - thanh tung ((va hang) OR (van hang)) ((nong manh) OR (duong manh)) toan ban.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh tung ((va hang) or (van hang)) ((nong manh) or (duong manh)) toan ban*.