Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » thuoc sach, thu hoach, khau sach
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
hieu vu » hieu va, hieu ve, hieu su
hanh di » hanh vi, hanh de, hang di
xuc van » duc van, luc van, xuc ban
vu chat » va chat, ve chat, du chat
tu sach » su sach, te sach, tu cach
cua tre » cua te, cuu tre, cua triet
nang o » nang co, nang ho, nang ro
di cua » dai cua, doi cua, de cua
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 sach) or (((thu sach) or (thuat sach)))) ky nang o hoi. hieu vu chat xuc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((thu sach) OR (thuat sach)))) ky nang o hoi. hieu vu chat xuc van hanh di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (((thu sach) or (thuat sach)))) ky nang o hoi. hieu vu chat xuc van hanh di cua tre*.