Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
mang xa » lang xa, mang may, dang xay
hieu va » lieu va, hieu qua
cac tuc » cac toc, cac tu, cac tac
tuc van » thuc van, truc van, tuc va
vi cua » vai cua, di cua
cua te » cua tu

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) OR (sach tu)) mang xa hoi. hieu va cac tuc van hanh vi cua te~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) OR (sach tu)) mang xa hoi. hieu va cac tuc van hanh vi cua te*.