Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh dung » thanh duong, thanh tung, thanh hung
dang huong » dang thuong, dang hung, dong huong
hieu cach » hieu cac, hieu ca, biet cach
huong ban » huong dan, huong ben, huong lan
dung cua » dung luan, dung cho
cua dang » cua cong, cua ban
phan cau » phan dau, phan cac, phan tu
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (hieu cach)) - thanh dung cua dang huong ban ((phan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (hieu cach)) - thanh dung cua dang huong ban ((phan cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (hieu cach)) - thanh dung cua dang huong ban ((phan cau) or (toan cau))*.