Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh vat » trinh van, trinh luat, sinh vat
hang cong » dang cong, hang nong, bang cong
chi xanh » chi danh, chi hanh, chieu xanh
vat hang » van hang, dat hang, va hang
chi anh » chi danh, chi hanh, thi anh
tac tai » tac trai, tac thi, bac tai
bac dai » bach mai

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi xanh) or (chi anh)) - hanh trinh vat hang cong ((tac tai) or (bac dai)) ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi anh)) - hanh trinh vat hang cong ((tac tai) OR (bac dai)) ca.
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi anh)) - hanh trinh vat hang cong ((tac tai) or (bac dai)) ca*.