Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
doc chieu » doi chieu, toc thieu, hoc thieu
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
va trong » va truong, va thong, va tuong
san hang » san chang, van hang, san sang
ban hang » ngan hang

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

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