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 » thuat sach, thuoc sach, thu hoach
nang lai » nang tai, mang lai, nang cai
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
tu sach » su sach, te sach, tu cach
lai hoi » dai hoi, lai hoa, lai roi
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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 ve cam ((xuc van) OR (vuc van)) thanh vi cua thuoc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang lai hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vi cua thuoc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) y nang lai hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vi cua thuoc".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) y nang lai hoi. hieu ve cam ((xuc van) OR (vuc van)) thanh vi cua thuoc*.