Perhaps you should try some spelling variations:
ban thanh » ban hang
hoai cuu » hoi cua, hoa cua, hoai thu
nang lai » nang tai, mang lai, nang cai
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
cay lua » vay luan
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
cam dua » ca dua, cay dua, chay dua
hieu ve » hieu va, hieu van
lai roi » lai hoi, loi roi
ty nang » ky nang, ty xang, ty hang

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 ty nang lai roi. hieu ve ((cam dua) or (cay lua)) ((ban thanh) or (ban hanh)) hoai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang lai roi. hieu ve ((cam dua) OR (cay lua)) ((ban thanh) OR (ban hanh)) hoai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang lai roi. hieu ve ((cam dua) or (cay lua)) ((ban thanh) or (ban hanh)) hoai cuu tre*.