Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dau nuoc » dat nuoc, dau ngoc, cap nuoc
dan thuc » dan toc, am thuc
dinh thi » dinh tri
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
van dau » van dao, phan dau
cuu tre » cua 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: tu sach ky dang xa hoi. hieu van dau nuoc va ((dan thuc) or (dinh thi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xa hoi. hieu van dau nuoc va ((dan thuc) OR (dinh thi)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xa hoi. hieu van dau nuoc va ((dan thuc) or (dinh thi)) cuu tre*.