Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh dai » hanh tai, hanh dao, vanh dai
thu sach » tu sach, thuat sach, thu hoach
van hanh » van thanh, ban hanh, van anh
phat xuc » chat xuc, phat xuat, phap xu
tu cach » tu cac
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (((thu sach) OR (thuoc sach)))) ky nang o hoi. hieu va phat xuc van hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((thu sach) OR (thuoc sach)))) ky nang o hoi. hieu va phat xuc van hanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (((thu sach) OR (thuoc sach)))) ky nang o hoi. hieu va phat xuc van hanh dai cua tre*".