Perhaps you should try some spelling variations:
thieu tach » chiet tach, chieu sach, hieu cach
thien hach » thien thanh, hien hanh
nang cong » nang song, dang cong, bang cong
cong van » cong vang, cong san, song van
cong va » dong va, cong ha, cong tac
va nang » van nang, da nang, cam nang
van tho » van thao, van thu, van thi
tho cac » cho cac, tho ca, thong cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu tach) or (thien hach)) - thanh cong va nang cong van tho cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tach) OR (thien hach)) - thanh cong va nang cong van tho cac*.