Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
nhung dung » phuong dung, ung dung, thong dung
hoc chieu » hoc thieu, ho chieu, hoc hien
hanh sinh » hanh tinh, hanh dinh, hinh sinh
sinh va » sinh vat, tinh va, dinh van
van tan » van tuan, van ban, van tai
tan ban » toan ban, tang ban, van ban

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 - hanh sinh va ((nhung dung) or (trong cong)) van tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh sinh va ((nhung dung) OR (trong cong)) van tan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh sinh va ((nhung dung) or (trong cong)) van tan ban*.