Perhaps you should try some spelling variations:
hanh trinh » canh tranh
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
doi chieu » doc hieu, doi chi, ho chieu
cua thong » cua thuong, cua khong, cua tong
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.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) cua thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) cua thong cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) cua thong cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (doi chieu)) xanh - ((hanh trinh) OR (hanh chinh)) cua thong cong dan van ban*.