Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
trinh vat » trinh van, trinh luat, sinh vat
vat trong » viet trong, cay trong, dot trong
nhanh cau » nhanh cay, thanh chau, nhanh ha
ho chieu » hoc thieu, doi chieu, mot chieu
cong tac » cong ty

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

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