Perhaps you should try some spelling variations:
cach thuc » anh thuc, cac thu
dia thanh » gia thanh, da thanh, dinh thanh
thanh vi » hanh vi, thanh va, thanh ve
thuc dia » thuc dieu, thuat dia, thuc giai
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
va cach » va cac
nang xa » lang xa, nang ma, mang xa
cuu tre » cua tre, cau tren, cau treo
co sach » bo sach, cuon sach, hoc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach y ((nang xa) OR (nang x)) hoi. hieu va cach thuc dia thanh vi ((cuu tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach y ((nang xa) OR (nang x)) hoi. hieu va cach thuc dia thanh vi ((cuu tre) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach y ((nang xa) OR (nang x)) hoi. hieu va cach thuc dia thanh vi ((cuu tre) or (su triet))*".