Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
sach thu » sach thue, sach thieu, sach tham
hanh va » hang va
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sach ty » sach y, sach tu, xach tay
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va nam » van nam, ha nam, va nay

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) OR (sach thu)) lang xa hoi. hieu va nam thuc va ((hanh va) OR (hanh vi)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ty) OR (sach thu)) lang xa hoi. hieu va nam thuc va ((hanh va) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ty) OR (sach thu)) lang xa hoi. hieu va nam thuc va ((hanh va) OR (hanh vi)) cua tre*.