Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
cua thuoc » cay thuoc, cua nuoc, cua quoc
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
cham duc » pham duc, cham soc, pham duy
hieu van » thien van, lieu va, hieu ve
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
dong ha » dong hoa, dong va, dong hoc
ky dong » ly dong, ky dang, ky cong
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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 dong ha noi. ((hieu van) or (hieu va)) cham duc ban hanh vai ((cua thuoc) OR (nha thuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dong ha noi. ((hieu van) OR (hieu va)) cham duc ban hanh vai ((cua thuoc) OR (nha thuoc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky dong ha noi. ((hieu van) or (hieu va)) cham duc ban hanh vai ((cua thuoc) OR (nha thuoc))".
• Adding a wildcard symbol may retrieve word variants: su sac ky dong ha noi. ((hieu van) or (hieu va)) cham duc ban hanh vai ((cua thuoc) OR (nha thuoc))*.