Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh vat » trinh van, trinh luat, sinh vat
dang cong » dung cong
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
vat dang » van dang, vat dung, va dang
cong van » cong vang, cong san, song van
tai cua » thai cua, tai cuc, dai cua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - hanh trinh vat dang cong van ((tai cua) OR (tri cua))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi xanh) or (chi hanh)) - hanh trinh vat dang cong van ((tai cua) OR (tri cua))~".
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi hanh)) - hanh trinh vat dang cong van ((tai cua) OR (tri cua))*.