Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
cham duc » pham duc, cham soc, pham duy
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
mai hoi » dai hoi, lai hoi, mai doi
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
va hanh » van hanh, va thanh, va danh
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, ma hoa, me hoi

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 ((ma hoi) or (((mai hoi) or (mai khoi)))). hieu vu cham duc va hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty xang ((ma hoi) OR (((mai hoi) OR (mai khoi)))). hieu vu cham duc va hanh kem cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty xang ((ma hoi) or (((mai hoi) or (mai khoi)))). hieu vu cham duc va hanh kem cua tre*.