Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
vien dai » hien dai
sach ly » sach lo, sach ty, sach hay
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ly) or (sach y)) lang xa hoi. hieu ((ve cac) or (vien dai)) xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ly) OR (sach y)) lang xa hoi. hieu ((ve cac) OR (vien dai)) xuc van hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ly) or (sach y)) lang xa hoi. hieu ((ve cac) or (vien dai)) xuc van hanh vi cua tre*.