Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
thang cong » thanh cong, thang long, thong cong
hoc thieu » toc thieu, hoc hien
trung cap » truong cao, trung tam
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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 tinh - thanh ((dung cho) or (trung cap)) thang cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh ((dung cho) OR (trung cap)) thang cong dan than ban*.