Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
tu cach » tu cac
hieu vu » hieu va, hieu ve, hieu su
hanh ve » hanh vi, hanh va, hanh kem
xuc van » duc van, luc van, vuc van
vu chat » va chat, ve chat, du chat
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te 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 cach) or (so sach)) ky nang ((o hoi) or (x ho)). hieu vu chat xuc van hanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (so sach)) ky nang ((o hoi) OR (x ho)). hieu vu chat xuc van hanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (so sach)) ky nang ((o hoi) or (x ho)). hieu vu chat xuc van hanh ve cua tre*.