Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc ca » thuoc cao, thuoc ma, thuoc va
sach ky » sac ky, sach y, sach ty
dao bai » cao bai, dao hai, dao lai
dao vai » dao van, dao va, dao hai
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
dang xa » dang xay, dang ha, dang va
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ky ((dang xa) or (lang xa)) hoi. hieu va nam thuoc ca ((dao vai) OR (dao bai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ky ((dang xa) OR (lang xa)) hoi. hieu va nam thuoc ca ((dao vai) OR (dao bai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ky ((dang xa) or (lang xa)) hoi. hieu va nam thuoc ca ((dao vai) OR (dao bai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ky ((dang xa) or (lang xa)) hoi. hieu va nam thuoc ca ((dao vai) OR (dao bai)) cuu tre*.