Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
thuc day » thuc dan, thuc vat
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
danh di » danh du, xanh di, danh dien
hanh de » hanh kem
hanh ve » hanh vi, hanh va, hanh kem
cua tre » cua te, cuu tre, cua triet
qua am » quan am, qua ap, cua am

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang xa hoi. hieu qua am thuc day ((danh di) or (((hanh de) or (hanh ve)))) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. hieu qua am thuc day ((danh di) OR (((hanh de) OR (hanh ve)))) cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. hieu qua am thuc day ((danh di) or (((hanh de) or (hanh ve)))) cua tre*.