Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, nang cao
xuc van » duc van, luc van, vuc van
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (sach ty)) ((nang ma) or (lang xa)) hoi. hieu ve cam xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach ty)) ((nang ma) OR (lang xa)) hoi. hieu ve cam xuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach ty)) ((nang ma) or (lang xa)) hoi. hieu ve cam xuc van hanh vi cua tre*.