Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, nhan sinh
hanh trinh » canh tranh, hanh chinh
cong doan » cong dan, cong hoan, dong doanh
chi danh » chi dan, chi anh, chi dinh
cua dung » cua dang, cua dong, qua dung
doan van » doan va, hoang van, luan van
doi chi » doi khi

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 danh - ((nhanh tinh) or (hanh trinh)) ((cua dung) or (cua ban)) cong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi danh - ((nhanh tinh) OR (hanh trinh)) ((cua dung) OR (cua ban)) cong doan van ban.
• Adding a wildcard symbol may retrieve word variants: doi chi danh - ((nhanh tinh) or (hanh trinh)) ((cua dung) or (cua ban)) cong doan van ban*.