Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
mot chieu » doi chieu, ho chieu
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

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