Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dan thai » dang thai, dan thi, dan than
dinh thi » dinh tri
sach ky » sac ky, sach ty, sach kem
lang xa » lang ha, dang xay, lang van
van dat » van dao, van dau, dan dat
cuu tre » cua tre, cau tren, cau treo
nuoc » quoc, duoc, ngoc

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) OR (sach y)) lang xa hoi. hieu van dat nuoc va ((dan thai) or (dinh thi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) lang xa hoi. hieu van dat nuoc va ((dan thai) OR (dinh thi)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) lang xa hoi. hieu van dat nuoc va ((dan thai) or (dinh thi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) lang xa hoi. hieu van dat nuoc va ((dan thai) or (dinh thi)) cuu tre*.