Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
sach thu » sach thue, sach thieu, sach tham
lang xa » lang ha, dang xay, lang van
cach tu » cach thuc
thuc va » thuc vat, thuc dan, thuc day
va dinh » van dinh, va kinh, va tinh
dinh va » dinh van, dinh ve, tinh va
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((cach tu) or (sach thu)) lang xa hoi. hieu van nam thuc va dinh va ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((cach tu) OR (sach thu)) lang xa hoi. hieu van nam thuc va dinh va ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((cach tu) or (sach thu)) lang xa hoi. hieu van nam thuc va dinh va ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc ((cach tu) or (sach thu)) lang xa hoi. hieu van nam thuc va dinh va ((cua tre) OR (cuu tre))*.