Perhaps you should try some spelling variations:
day nhanh » day thanh, duy nhanh, dac nhan
nam thuc » nam thuoc, am thuc, nam thu
day hanh » day thanh, dao hanh, day manh
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
va nam » van nam, ha nam, va nay
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) or (sach ty)) nang x hoi. lieu va nam thuc ((day hanh) or (day nhanh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach ty)) nang x hoi. lieu va nam thuc ((day hanh) OR (day nhanh)) de cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) or (sach ty)) nang x hoi. lieu va nam thuc ((day hanh) or (day nhanh)) de cua tre*.