Perhaps you should try some spelling variations:
canh trinh » canh tranh, canh tinh, anh trinh
hanh trinh » canh tranh, hanh chinh
hoc thieu » toc thieu, hoc hien
hang cong » dang cong, hang nong, bang cong
cong doan » cong dan, cong hoan, dong doanh
doan phan » doanh phan, toan phan, dan phan
doc hieu » toc thieu, hoc hien
va hang » van hang, va nang, va lang

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

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