Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
xach tay » canh tay
xuc van » duc van, luc van, xuc ban
sach ty » sach y, sach thu, sach hay
tang ma » mang may, tang van
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc
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: te ((((sach ty) OR (xach tay))) or (sach tu)) tang ma hoi. hieu qua ca xuc van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((((sach ty) OR (xach tay))) OR (sach tu)) tang ma hoi. hieu qua ca xuc van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((((sach ty) OR (xach tay))) or (sach tu)) tang ma hoi. hieu qua ca xuc van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((((sach ty) OR (xach tay))) or (sach tu)) tang ma hoi. hieu qua ca xuc van hanh vi cua tre*.