Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
nang cong » nang song, dang cong, bang cong
tung cao » nung cao, truong cao, trung cap
cao nang » cao dang, cam nang, cao tang
tan thai » tay thai, ban thai, tan tai
ban thi » dan thi, van thi, can thi

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 - thanh tung cao nang cong ((tan thai) or (ban thi)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - thanh tung cao nang cong ((tan thai) OR (ban thi)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - thanh tung cao nang cong ((tan thai) or (ban thi)) cao*.