Perhaps you should try some spelling variations:
nam thuoc » nam thu, nha thuoc, cay thuoc
dang xay » dang van, van xay
nam thuc » am thuc, nam thu, nam tu
dan dai » dat dai, can dai, dan dat
toc sac » toc sach, toc san, hoc sach
lang xa » lang ha, lang van
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
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 sac ky ((lang xa) or (dang xay)) hoi. lieu va ((nam thuc) or (nam thuoc)) va dan dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((lang xa) OR (dang xay)) hoi. lieu va ((nam thuc) OR (nam thuoc)) va dan dai cua tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((lang xa) or (dang xay)) hoi. lieu va ((nam thuc) or (nam thuoc)) va dan dai cua tre*.