Perhaps you should try some spelling variations:
chau phuc » chau phu, cau phuc, khac phuc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, tao hoi
cao hoc » co hoc, cho hoc, chat hoc
hieu ve » hieu va, hieu van
vu hanh » vu khanh, vu thanh, du hanh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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: te sach ky nang ((cao hoi) OR (cao hoc)). ((hieu ve) OR (hieu qua)) chau phuc vu hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((cao hoi) OR (cao hoc)). ((hieu ve) or (hieu qua)) chau phuc vu hanh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((cao hoi) OR (cao hoc)). ((hieu ve) or (hieu qua)) chau phuc vu hanh vi cua tre*.