Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
thanh thoai » than thoai, thanh hoai, thanh hoa
thieu tach » chiet tach, chieu sach, hieu cach
thien hach » thien thanh, hien hanh
cong thanh » dong thanh, cong trinh, cong tan
nang cong » nang song, dang cong, bang cong
thoai cac » tai cac, thong cac, tho cac
tuong va » truong va, thuong va, luong va
va nang » van nang, da nang, cam nang

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 tuong va nang cong thanh thoai cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tach) OR (thien hach)) - thanh tuong va nang cong thanh thoai cac*.