Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
dang huong » dang thuong, dang hung, dong huong
hoc thieu » toc thieu, hoc hien
tung cua » trung cua, tuong cua, tang cua
dung cua » dung luan, dung cho
chan cap » than cap, cao cap, phan cac
khan cap » khan ap, than cap, khoan cam

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 thieu sach - thanh ((tung cua) OR (dung cua)) dang huong dan ((chan cap) OR (khan cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - thanh ((tung cua) or (dung cua)) dang huong dan ((chan cap) OR (khan cap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - thanh ((tung cua) or (dung cua)) dang huong dan ((chan cap) OR (khan cap))*.