Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hoc sach » hoc sinh, hoc cac, hoc anh
tu cach » tu cac
tuc van » thuc van, truc van, tuc va
cao tuc » dao tuc, cao duc, cao suc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
va cao » va cac, va co, va dao
vi cua » vai cua, di cua

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 (((te sach) or (hoc sach)))) ky nang xa hoi. hieu va cao tuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (((te sach) OR (hoc sach)))) ky nang xa hoi. hieu va cao tuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (((te sach) or (hoc sach)))) ky nang xa hoi. hieu va cao tuc van hanh vi cua tre*.