Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
nam thuc » am thuc, nam thu, nam tu
toc sach » hoc sach, doc sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
hieu ca » hieu cac, hieu cua, hieu va
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
dan tai » van tai, dan thi, han tai
cuu tre » cua tre, cau treo
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky lang xa hoi. hieu ca ((nam thuc) or (nam thuoc)) va dan tai ((cuu tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky lang xa hoi. hieu ca ((nam thuc) OR (nam thuoc)) va dan tai ((cuu tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: toc sach ky lang xa hoi. hieu ca ((nam thuc) or (nam thuoc)) va dan tai ((cuu tre) or (cau tren))*.