Perhaps you should try some spelling variations:
cham sac » cham soc, pham sach, cap sac
su sach » so sach, vu sach
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
sac van » cac van, san van, sat van
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang ha » long ha
xang xa » lang xa, mang xa, ang xa
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((xang xa) or (lang ha)) hoi. hieu ve cham sac van ((hanh di) or (hanh de)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((xang xa) OR (lang ha)) hoi. hieu ve cham sac van ((hanh di) OR (hanh de)) cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y ((xang xa) or (lang ha)) hoi. hieu ve cham sac van ((hanh di) or (hanh de)) cua tre*.