Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thu sach » thuat sach, thu hoach, khau sach
hieu cao » chieu cao, hieu cac, hieu ca
hanh dai » hanh tai, hanh dao, vanh dai
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
cao cau » cao cap, co cau, tao cau
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet

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

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