Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
san benh » sau benh, tai benh, so benh
cau treo » cau theo, cau tren, cau triet
lang xa » lang ha, dang xay, lang van
van cam » van nam, van lam, van dam
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
ba benh » va benh, bo benh, bach benh
van cau » van dau, van hau, van chat
di cau » da cau, diem cau

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 lang xa hoi. hieu ((van cam) OR (van cau)) xuc ((san benh) or (ba benh)) di cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. hieu ((van cam) OR (van cau)) xuc ((san benh) OR (ba benh)) di cau treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. hieu ((van cam) OR (van cau)) xuc ((san benh) or (ba benh)) di cau treo*".