Perhaps you should try some spelling variations:
cua thuoc » nha thuoc, cay thuoc, cua nuoc
thanh vi » hanh vi, thanh va, thanh ve
thu sach » tu sach, thuat sach, thuoc sach
nang lai » nang tai, mang lai, nang cai
vuc van » luc van, thuc van, chuc van
duc van » duc va, duc tan, duc manh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
ve cam » ve cham, ve cac, va cam

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) or (thu sach)) y nang lai hoi. hieu ve cam ((duc van) or (vuc van)) thanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu sach)) y nang lai hoi. hieu ve cam ((duc van) OR (vuc van)) thanh vi cua thuoc.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu sach)) y nang lai hoi. hieu ve cam ((duc van) or (vuc van)) thanh vi cua thuoc*.