Perhaps you should try some spelling variations:
hoc trieu » hoc thieu, hoc tieu, hoc dieu
trinh thi » trinh tai, dinh thi, trinh tin
hang cong » dang cong, hang nong, bang cong
trinh tu » trinh ky, trinh do
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc trieu tinh - hanh ((trinh thi) or (trinh tu)) hang cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc trieu tinh - hanh ((trinh thi) OR (trinh tu)) hang cong dan than cap*.