Perhaps you should try some spelling variations:
kien sach » dien sach, vien bach, kien mac
trang cua » tranh cua, trung cua, thang cua
hoc kien » hoc hien, hoc vien, hoa kien
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
than cap » khan cap, thanh lap, thanh cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kien sach - hanh ((trang cua) OR (tang cua)) hang ((cong tan) OR (cong san)) than cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc kien sach - hanh ((trang cua) or (tang cua)) hang ((cong tan) OR (cong san)) than cap~".
• Adding a wildcard symbol may retrieve word variants: hoc kien sach - hanh ((trang cua) or (tang cua)) hang ((cong tan) OR (cong san)) than cap*.