Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
hanh trinh » canh tranh, hanh chinh
trinh phan » trinh han, trinh quan, thanh phan
phan thanh » pham thanh, ban thanh, van thanh
thanh long » thanh cong, thang long, thanh huong
hien hanh » dieu hanh
thanh cac » hanh cac, thanh bac, thanh ca
long dan » long doan, cong dan, nong dan
khan cap » khan ap, than cap, khoan cam

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 trinh phan thanh long dan ((khan cap) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (hien hanh)) - hanh trinh phan thanh long dan ((khan cap) OR (thanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (hien hanh)) - hanh trinh phan thanh long dan ((khan cap) or (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (hien hanh)) - hanh trinh phan thanh long dan ((khan cap) or (thanh cac))*.