Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
canh trang » canh tranh, hanh trang, banh trang
hien hanh » dieu hanh
va tuong » va thuong, va thong, xa truong
cong dan » cong san, cong tan, huong dan
dan quan » van quan, ban quan, dan luan
va tong » va thong, va trong, va cong
quan ha » quan he

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)) - canh trang ((va tong) OR (va tuong)) cong dan quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - canh trang ((va tong) OR (va tuong)) cong dan quan ha.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (hien hanh)) - canh trang ((va tong) OR (va tuong)) cong dan quan ha".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (hien hanh)) - canh trang ((va tong) OR (va tuong)) cong dan quan ha*.