Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hien hanh » dieu hanh
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
manh cua » ban cua
cong dan » cong san, cong tan, huong dan
dan hanh » dang hanh, dan khanh, dan thanh
hanh tu » anh tu, danh tu

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 nhanh) or (hien hanh)) - hanh ((manh cua) or (doanh cua)) hang cong dan hanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - hanh ((manh cua) OR (doanh cua)) hang cong dan hanh tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - hanh ((manh cua) or (doanh cua)) hang cong dan hanh tu*.