Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
lang van » dang van, tang van, hoang van
hanh va » hanh vi
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
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 ky) OR (sach ty)) lang van hoa. lieu va nam thuc va ((hanh va) or (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach ty)) lang van hoa. lieu va nam thuc va ((hanh va) OR (hang va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((sach ky) OR (sach ty)) lang van hoa. lieu va nam thuc va ((hanh va) or (hang va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) OR (sach ty)) lang van hoa. lieu va nam thuc va ((hanh va) or (hang va)) cua tre*.