Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cham sac » cham soc, pham sach, cap sac
sac van » cac van, san van, sat van
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
mang xa » lang xa, mang may, dang xay
sach ty » sach tu, sach thu, xach tay
xang xa » lang xa, ang xa, dang xay
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) ((xang xa) OR (mang xa)) hoi. hieu vu cham sac van hanh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) ((xang xa) or (mang xa)) hoi. hieu vu cham sac van hanh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) ((xang xa) or (mang xa)) hoi. hieu vu cham sac van hanh vi cuu tre*.