Perhaps you should try some spelling variations:
nha thuoc » nha nuoc, nhan thuc, nha hoc
ban hanh » ban hang
thu sach » thuat sach, thuoc sach, thu hoach
nang lai » nang tai, mang lai, nang cai
ve cham » va cham, ve chat, vu cham
xuc ban » duc ban, cuc ban, quoc ban
tu sach » su sach, te sach, tu cach
lai hoi » dai hoi, lai hoa, lai roi
y nang » ky nang, ly nang, v nang
vi nha » ve nha, va nha, li nha
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (thu sach)) y nang lai hoi. hieu ((va cam) or (ve cham)) xuc ban hanh vi nha thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang lai hoi. hieu ((va cam) OR (ve cham)) xuc ban hanh vi nha thuoc.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang lai hoi. hieu ((va cam) or (ve cham)) xuc ban hanh vi nha thuoc*.