Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, cam xuc, chao xu
lang van » dang van, tang van, hoang van
cham xuc » cam xuc, cham soc, pham duc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
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: su sach ky ((nang xa) or (lang van)) hoi. hieu ve ((cham xuc) or (chat xuc)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (lang van)) hoi. hieu ve ((cham xuc) OR (chat xuc)) van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (lang van)) hoi. hieu ve ((cham xuc) or (chat xuc)) van hanh vi cua tre*.