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