Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
quan thanh » ban thanh, van thanh
thanh nong » thanh cong, thanh long, thanh hong
thanh cac » hanh cac, thanh bac, thanh ca
nong dan » cong dan, nong san, nguong 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 - hanh trinh quan thanh nong dan ((khan cap) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh trinh quan thanh nong dan ((khan cap) OR (thanh cac)).
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh trinh quan thanh nong dan ((khan cap) or (thanh cac))*.