Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
dang van » hoang van
hanh va » hanh vi
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
van hoe » van hoa, van hoc, van hieu
cua tre » cua te, cuu tre, cua triet
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sai ky)) dang van hoe. hieu van nam thuc va ((hanh va) OR (hang va)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sai ky)) dang van hoe. hieu van nam thuc va ((hanh va) OR (hang va)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sai ky)) dang van hoe. hieu van nam thuc va ((hanh va) OR (hang va)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sai ky)) dang van hoe. hieu van nam thuc va ((hanh va) OR (hang va)) cua tre*.