Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tu cach » tu cac
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac xuc » cac nuoc, chat xuc, cac cuoc
cua tre » cua te, cuu tre, cua triet
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 (su sach)) ky nang xa hoi. hieu ve ((cac xuc) or (cam xuc)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang xa hoi. hieu ve ((cac xuc) OR (cam xuc)) van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang xa hoi. hieu ve ((cac xuc) or (cam xuc)) van hanh vi cua tre*.