Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
san than » sang than, san thanh, ban than
than cau » toan cau, phan cau, than cap

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

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