Perhaps you should try some spelling variations:
hanh lam » thanh lap, hanh kem, hanh va
cham duc » pham duc, cham soc, pham duy
mai hoi » mai khoi, dai hoi, lai hoi
lam cua » nam cua, lam chat
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
ma hoi » xa hoi, ma hoa, me hoi

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: so ((sach ty) OR (sach tu)) tang ((ma hoi) OR (mai hoi)). hieu vu cham duc va hanh lam cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach ty) OR (sach tu)) tang ((ma hoi) or (mai hoi)). hieu vu cham duc va hanh lam cua tre~".
• Adding a wildcard symbol may retrieve word variants: so ((sach ty) OR (sach tu)) tang ((ma hoi) or (mai hoi)). hieu vu cham duc va hanh lam cua tre*.