Perhaps you should try some spelling variations:
kinh sach » sinh sach, dinh sach, tinh sach
thanh ban » thanh san, thanh van, thanh bac
hoc kinh » hoc sinh, luoc kinh
trang va » tran van, hang va
cong ban » cong bang, cong san, cong dan
cong tan » cong tac, cong san, cong thanh
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kinh sach - hanh ((trang va) or (luan van)) dung ((cong ban) OR (cong tan)) thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh sach - hanh ((trang va) OR (luan van)) dung ((cong ban) OR (cong tan)) thanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc kinh sach - hanh ((trang va) or (luan van)) dung ((cong ban) OR (cong tan)) thanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc kinh sach - hanh ((trang va) or (luan van)) dung ((cong ban) OR (cong tan)) thanh ban*.