Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
thu sach » thuat sach, thuoc sach, thu hoach
mang lai » mang lam, mang luoi, dang loai
tu sach » su sach, te sach, tu cach
va cham » va chat, va tham
vai cuu » vai cua
tuc ban » thuc ban, truc ban, tu ban
cuu tre » cua tre, cau tren, cau treo
lai hoi » dai hoi, lai hoa, lai roi
ky mang » ky nang, ke mang, ky dang
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: ((tu sach) or (thu sach)) ky mang lai hoi. hieu ((ve cam) or (va cham)) tuc ban thanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky mang lai hoi. hieu ((ve cam) OR (va cham)) tuc ban thanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky mang lai hoi. hieu ((ve cam) or (va cham)) tuc ban thanh vai cuu tre*.