Perhaps you should try some spelling variations:
truong cao » truong dai
hien hanh » dieu hanh
lang cong » dang cong, bang cong, hang cong
tuong va » truong va, thuong va, luong va
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 hien hanh - thanh ((tuong va) or (truong cao)) lang cong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh ((tuong va) OR (truong cao)) lang cong dan than tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh ((tuong va) or (truong cao)) lang cong dan than tap*.