Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hien hanh » dieu hanh
truong va » truong dai, truong cao, truong dao
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban
tung va » trung va, tuong va, dung va

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 ((tung va) or (truong va)) nhung cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - thanh ((tung va) OR (truong va)) nhung cong san toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - thanh ((tung va) or (truong va)) nhung cong san toan tap*.