Perhaps you should try some spelling variations:
thong tuong » thong thuong, thong thong, thong huong
thong duong » tuong duong, thong dung, thong huong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hoang manh » hoang minh, hoang anh, hoang xanh
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((canh tranh) or (hoang manh)) cua ((thong tuong) OR (thong duong)) van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((canh tranh) OR (hoang manh)) cua ((thong tuong) OR (thong duong)) van thanh van.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((canh tranh) or (hoang manh)) cua ((thong tuong) OR (thong duong)) van thanh van".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((canh tranh) or (hoang manh)) cua ((thong tuong) OR (thong duong)) van thanh van*.