Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong lam » trong lam, truong ham, truong luan
dung chung » dung cong, dung ung, dung trung
hoc chieu » hoc thieu, ho chieu, hoc hien
trung van » truong van, trong van, trung va
chung van » phung van, nhung van, chung han
van than » van thanh, van thang, van tuan
than cap » khan cap, thanh lap, thanh cac

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