Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
trang va » tran van, hang va
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trang va ((nhung cong) OR (dung cong)) danh ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh trang va ((nhung cong) or (dung cong)) danh ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trang va ((nhung cong) or (dung cong)) danh ((toan cau) OR (toan ban))*.