Perhaps you should try some spelling variations:
nang cong » nang song, dang cong, bang cong
chi xanh » chi anh, chi danh, chieu xanh
chi hanh » chi nhanh, chi thanh, thi hanh
tranh va » tranh van, trang va, trinh va
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat cau » phan cau, pha cau, phap cau
va nang » van nang, da nang, cam nang

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 hanh)) - canh tranh va nang cong tac phat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi hanh)) - canh tranh va nang cong tac phat cau.
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi hanh)) - canh tranh va nang cong tac phat cau*.