Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
sang mai » sang ma, sang tai, lang mai
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
ky sang » ky nang, ky dang, ky tang
lai cua » dai cua, hai cua, thai cua
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky sang mai hoi. hieu ve ((nam thuoc) or (cam xuc)) va danh ((lai cua) OR (lai chau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky sang mai hoi. hieu ve ((nam thuoc) OR (cam xuc)) va danh ((lai cua) OR (lai chau)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky sang mai hoi. hieu ve ((nam thuoc) or (cam xuc)) va danh ((lai cua) OR (lai chau)) tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky sang mai hoi. hieu ve ((nam thuoc) or (cam xuc)) va danh ((lai cua) OR (lai chau)) tre*.