Perhaps you should try some spelling variations:
can thuc » dan thuc, van thuc, cay thuc
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
vat anh » van anh, sat anh, dat anh
cuu tre » cua tre, cau tren, cau treo
d cuu » _ cuu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach tu)) nang xa hoi. ((hieu va) OR (lieu va)) can thuc vat anh d cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach tu)) nang xa hoi. ((hieu va) OR (lieu va)) can thuc vat anh d cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (sach tu)) nang xa hoi. ((hieu va) OR (lieu va)) can thuc vat anh d cuu tre*.