Perhaps you should try some spelling variations:
hien manh » tien manh, hieu manh, hien nhanh
hien hanh » dieu hanh
tranh cua » doanh cua, manh cua
trong dan » trong dang, trong san, trong tan
chinh cau » chinh chau, chinh ca, chinh can
cua dung » cua dang, cua dong, qua dung
can cau » van cau, ban cau, ca cau

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 manh) or (hien hanh)) - canh tranh cua dung trong dan ((can cau) or (chinh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hien hanh)) - canh tranh cua dung trong dan ((can cau) OR (chinh cau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) or (hien hanh)) - canh tranh cua dung trong dan ((can cau) or (chinh cau))*.