Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
nhung don » nhung van, nhung bo
hang cong » dang cong, hang nong, bang cong
dan toan » van toan, dan than, manh toan
toan ban » van ban

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) or (hien nhanh)) - hanh tang luan ((nhung don) or (hang cong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (hien nhanh)) - hanh tang luan ((nhung don) OR (hang cong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (hien nhanh)) - hanh tang luan ((nhung don) or (hang cong)) dan toan ban*.