Perhaps you should try some spelling variations:
chiet tach » chieu sach
cong tinh » cong trinh, cong vinh, cong thanh
long tinh » trong tinh, luong tin, dong tin
ho chiet » ho chieu, ho thiet, hoc thiet
trang va » hang va
tran van » luan van
toan cau » toan cao, toan ban, toan tap

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) OR (tran van)) nhung ((cong tinh) OR (long tinh)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh ((trang va) or (tran van)) nhung ((cong tinh) OR (long tinh)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh ((trang va) or (tran van)) nhung ((cong tinh) OR (long tinh)) toan cau*.