Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cau phuc » cau truc, chau phu, huu phuc
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
vu dinh » quy dinh
ket cua » ket qua, det cua, keo cua
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((tu sach) or (thuoc sach))) or (te sach)) ky nang xa hoi. hieu ve cau phuc vu dinh ket cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (thuoc sach))) OR (te sach)) ky nang xa hoi. hieu ve cau phuc vu dinh ket cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (thuoc sach))) or (te sach)) ky nang xa hoi. hieu ve cau phuc vu dinh ket cua tre*.