Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nha thuoc, cay thuoc
dang van » hoang van, hang va
toc sac » toc sach, toc san, hoc sach
tai cuu » tai cuc, tai buu, tai cua
dan tai » van tai, dan thi, han tai
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
cuu tre » cua tre, cau tren, cau treo
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 van)) hoi. hieu va ((nam thuoc) or (nam thu)) va dan tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky ((lang xa) OR (dang van)) hoi. hieu va ((nam thuoc) OR (nam thu)) va dan tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc sac ky ((lang xa) or (dang van)) hoi. hieu va ((nam thuoc) or (nam thu)) va dan tai cuu tre*.