Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thuc day » thuc vat
thuc dan » thuc hanh, hoc dan, thuc vat
hang dau » hang va, hang tai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
dau cua » dai cua, day cua, cau cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach y nang xa hoi. hieu ve cac ((thuc day) or (thuc dan)) hang dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach y nang xa hoi. hieu ve cac ((thuc day) OR (thuc dan)) hang dau cua tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach y nang xa hoi. hieu ve cac ((thuc day) or (thuc dan)) hang dau cua tre*.