Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cua tre » cua te, cua triet, dua tren
dung co » dung cho, dung cong, dung cua
va dung » van dung, va duong, vat dung
cam tuc » cam xuc, cam tu, nam thuc
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
cuu tre » cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cam tuc va dung co ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cam tuc va dung co ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cam tuc va dung co ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. ((hieu ve) OR (hieu van)) cam tuc va dung co ((cua tre) or (cuu tre))*.