Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh di » hanh vi, hanh de, hang di
soc van » hoc van, oc van, sac van
tu cham » toc cham, thi cham
sach ty » sach y, sach thu, xach tay
vu cham » va cham, vu kham, qua cham
xang xa » lang xa, mang xa, ang xa
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (sach tu)) xang xa hoi. hieu ((vu cham) OR (tu cham)) soc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) xang xa hoi. hieu ((vu cham) OR (tu cham)) soc van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach tu)) xang xa hoi. hieu ((vu cham) OR (tu cham)) soc van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach tu)) xang xa hoi. hieu ((vu cham) OR (tu cham)) soc van hanh di cua tre*.