Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
can thuc » dan thuc, van thuc, cay thuc
thuc van » thuc vat, thuc dan, thuc va
van dinh » van minh, van dich, va dinh
sach ky » sac ky, sach y, sach ty
van can » van canh, van ban, ban can
dinh di » dinh du, dinh vi, danh di
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (cac ky)) nang x hoi. hieu van can thuc van dinh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (cac ky)) nang x hoi. hieu van can thuc van dinh di cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (cac ky)) nang x hoi. hieu van can thuc van dinh di cuu tre*.