Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
hang cong » dang cong, hang nong, bang cong
trung ha » trung hoc, trung tam, trung cap
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien thanh - thanh ((truong dai) or (trung ha)) hang cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - thanh ((truong dai) OR (trung ha)) hang cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - thanh ((truong dai) or (trung ha)) hang cong dan than tap*.