Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
san benh » sau benh, tai benh, so benh
lang ha » long ha
lang xa » dang xay, lang van
sach ky » sac ky, sach y, sach ty
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
xuc san » xuc ban, luc sang, nuoc san
benh di » benh dai, ben di, benh da
cua tre » cua te, cuu tre, cua triet
di cua » dai cua, doi cua, de cua

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