Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nha thuoc, cay thuoc
lieu nha » lieu khoa, lieu phap, lieu tham
hanh tai » thanh tai, hang tai, han tai
cuu tre » cua tre, cau tren, cau treo
tai cuu » tai cuc, tai buu, tai cua
xa hanh » xa thanh, xa khanh, va hanh
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang ma) or (tang ma)) hoi. lieu nha ((nam thuoc) OR (nam thu)) xa hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang ma) OR (tang ma)) hoi. lieu nha ((nam thuoc) OR (nam thu)) xa hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang ma) or (tang ma)) hoi. lieu nha ((nam thuoc) OR (nam thu)) xa hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang ma) or (tang ma)) hoi. lieu nha ((nam thuoc) OR (nam thu)) xa hanh tai cuu tre*.