Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hanh trinh » hanh chinh
mot chieu » doi chieu, ho chieu
cua thong » cua thuong, cua khong, cua tong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan tap » han tap, phan tap, chan ta

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 (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) cua thong cong dan chan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) cua thong cong dan chan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((mot chieu) or (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) cua thong cong dan chan tap".
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (hoc hien)) xanh - ((hanh trinh) OR (canh tranh)) cua thong cong dan chan tap*.