Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
tang mai » tang ma, tang tai, lang mai
lang dai » lang hai, lang mai, lang chai
hieu le » hieu ve, hieu he, hieu ly
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sac » su sach, su cac, su xac
le nam » ly nam, he nam, le na
sac ky » cac ky, sai ky
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: su sac ky ((tang mai) or (lang dai)) hoi. hieu le nam thuoc ((va hanh) or (va danh)) di cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((tang mai) OR (lang dai)) hoi. hieu le nam thuoc ((va hanh) OR (va danh)) di cua vat.
• Adding a wildcard symbol may retrieve word variants: su sac ky ((tang mai) or (lang dai)) hoi. hieu le nam thuoc ((va hanh) or (va danh)) di cua vat*.