Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
sang mai » sang ma, sang tai, lang mai
danh lai » danh sai, gianh lai, dinh lam
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
va danh » va dinh, va dan, va hanh
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ky sang » ky nang, ky dang, ky tang
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 tre) OR (cuu 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 tre) OR (cuu 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 tre) OR (cuu 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 tre) OR (cuu tre))*.