Perhaps you should try some spelling variations:
sach ky » sach y, sach ty, sach kem
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
ap thuc » tap thuc, am thuc, a thuc
cua tre » cua te, cuu tre, cua triet
mang xa » lang xa, mang may, dang xay
sac ky » cac ky, sai ky
de cua » le cua, te cua, dieu cua
qua » quan

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 ky) or (sac ky)) ((mang xa) or (nang x)) hoi. hieu qua ap thuc va hanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) ((mang xa) OR (nang x)) hoi. hieu qua ap thuc va hanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) ((mang xa) or (nang x)) hoi. hieu qua ap thuc va hanh de cua tre*.