Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong van » trong van, truong va, truong dai
dung phung » dung phuong, dung chung, dung nhung
hoc chieu » hoc thieu, ho chieu, hoc hien
trung vap » trung cap, trung va, trung van
van thanh » ban thanh, van tuan
thanh cap » thanh lap, hanh cap, than cap

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 ((trung vap) or (truong van)) dung phung van thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trung vap) OR (truong van)) dung phung van thanh cap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trung vap) or (truong van)) dung phung van thanh cap*.