Perhaps you should try some spelling variations:
cham sac » cham soc, pham sach, cap sac
sach ty » sach y, sach tu, sach thu
hanh de » hanh ve, hanh kem
hanh di » hanh vi, hang di, danh di
sac van » cac van, san van, sat van
su sach » so sach, vu sach
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
xang xa » mang xa, ang xa, dang xay
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 ty ((xang xa) OR (lang xa)) 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 ty ((xang xa) OR (lang xa)) hoi. hieu ve cham sac van ((hanh di) OR (hanh de)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((xang xa) OR (lang xa)) hoi. hieu ve cham sac van ((hanh di) or (hanh de)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((xang xa) OR (lang xa)) hoi. hieu ve cham sac van ((hanh di) or (hanh de)) cua tre*.