Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
cong tac » cong ty
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: hoc chiet tach - hanh ((trang cua) OR (tranh cua)) nhung cong tac ((toan cau) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((trang cua) or (tranh cua)) nhung cong tac ((toan cau) or (toan ban))*.