Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
dang xay » dang van, van xay
dinh ve » dinh ket, dinh van
dinh le » dinh ly, dinh ket, thinh le
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach ty, sach kem
xay hoi » xa hoi, tay hoi, cay phoi
cau tre » cau tren, cau treo, cau tra

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 (sach y)) dang xay hoi. hieu van nam thuc va ((dinh le) OR (dinh ve)) cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) dang xay hoi. hieu van nam thuc va ((dinh le) OR (dinh ve)) cau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) dang xay hoi. hieu van nam thuc va ((dinh le) OR (dinh ve)) cau tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) dang xay hoi. hieu van nam thuc va ((dinh le) OR (dinh ve)) cau tre*.