Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua quoc
cua nuoc » cua quoc, cua nguoi, nha nuoc
van hanh » van thanh, ban hanh, van anh
nang lai » nang tai, mang lai, nang cai
cam luu » tam luu
luu van » cuu van, luan van, luu hanh
sach ky » sach y, sach ty, sach kem
lai hoi » dai hoi, lai hoa, lai roi
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sac ky)) nang lai hoi. hieu va cam luu van hanh vi ((cua thuoc) or (cua nuoc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sac ky)) nang lai hoi. hieu va cam luu van hanh vi ((cua thuoc) OR (cua nuoc)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sac ky)) nang lai hoi. hieu va cam luu van hanh vi ((cua thuoc) or (cua nuoc))*.