Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
trinh vat » trinh van, trinh luat, sinh vat
thanh cau » thanh chau, thanh mau, nhanh cau
vat hang » van hang, dat hang, va hang
nong van » song van, nong dan, tong van
nong san » cong san, dong san, nong dan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo tieu)) xanh - hanh trinh vat hang ((nong van) OR (nong san)) thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo tieu)) xanh - hanh trinh vat hang ((nong van) OR (nong san)) thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo tieu)) xanh - hanh trinh vat hang ((nong van) OR (nong san)) thanh cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo tieu)) xanh - hanh trinh vat hang ((nong van) OR (nong san)) thanh cau*.