Perhaps you should try some spelling variations:
thieu tach » chieu sach, hieu cach, thieu cac
thien hach » thien thanh, hien hanh
chiet tach » chieu sach
thanh tung » thanh cong
nang cong » nang song, dang cong, bang cong
tung cam » dung cam, trung cap, tung pham
cong tan » cong tac, cong san, cong thanh
tan thai » tay thai, ban thai, tan tai
thai cao » tai cao, thoai cac, thuat cao

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))) or (chiet tach)) - thanh tung cam nang cong tan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu tach) OR (thien hach))) OR (chiet tach)) - thanh tung cam nang cong tan thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((thieu tach) OR (thien hach))) or (chiet tach)) - thanh tung cam nang cong tan thai cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu tach) OR (thien hach))) or (chiet tach)) - thanh tung cam nang cong tan thai cao*.