Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hien hanh » dieu hanh
lanh manh » lanh tranh, lan anh, van manh
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
manh cua » doanh cua, ban cua
ban hanh » ban hang
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)) - lanh manh cua ((hang cong) or (hang nong)) ban hanh tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - lanh manh cua ((hang cong) OR (hang nong)) ban hanh tu.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - lanh manh cua ((hang cong) or (hang nong)) ban hanh tu*.