Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach thu, xach tay
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren, cau treo
tang ma » mang may, tang van
sach tu » sach thu, cach tu, sach uu
qua ca » qua cac, qua cua, qua cai
ca xuc » cam xuc, chat xuc
vi cuu » vi luu, vinh cuu

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 (sach tu)) ((tang ma) or (nang cao)) hoi. hieu qua ca xuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) ((tang ma) OR (nang cao)) hoi. hieu qua ca xuc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) ((tang ma) or (nang cao)) hoi. hieu qua ca xuc van hanh vi cuu tre*.