Perhaps you should try some spelling variations:
thanh thoai » than thoai, thanh hoai, thanh hoa
thieu tach » chiet tach, chieu sach, hieu cach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
cong thanh » dong thanh, cong trinh, cong tan
nang cong » nang song, dang cong, bang cong
thoai cac » tai cac, thong cac, tho cac
tung va » trung va, tuong va, dung 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 tung va nang cong thanh thoai cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tach) OR (thien hach)) - thanh tung va nang cong thanh thoai cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tach) OR (thien hach)) - thanh tung va nang cong thanh thoai cac*.