Perhaps you should try some spelling variations:
nam thuoc » nam thuc, nam thu, nha thuoc
lieu nha » lieu khoa, lieu phap, lieu tham
hanh tai » thanh tai, hang tai, han tai
thuoc va » thuc va, thuoc ma, thuong va
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
nha nam » nhan nam, nha lam, ha nam
cuu tre » cua tre, cau tren, cau treo
tu bach » vu bach, tu cach, tu hach
ma hoi » mai hoi, xa hoi, me hoi
tu bac » tu ban, tu cac, tu bat

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

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