Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh trang » canh tranh, hanh trang, banh trang
trang thai » trang trai, trong thai, trang tai
thai vung » thai cong, thai van
vung cong » dung cong, vung dong, vung song
ho chieu » theo chieu, hoc thieu, doi chieu
tac toan » tap toan, tam toan, hach toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - canh trang thai vung cong ((tac toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh trang thai vung cong ((tac toan) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh trang thai vung cong ((tac toan) or (tinh toan)) cau*.