Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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: ((ho chieu) OR (hoc thieu)) xanh - ((hanh trinh) OR (canh tranh)) qua dung cong dan van ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - ((hanh trinh) or (canh tranh)) qua dung cong dan van ban~".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - ((hanh trinh) or (canh tranh)) qua dung cong dan van ban*.