Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
hieu van » hieu va, thien van, lieu va
cau treo » cau theo, cau tren, cau triet
nang dai » nang dau, nang tai, lang dai
cay dia » cac dia, cay dua, cay tia
van cay » van cau, van bay, van ca
sach ky » sac ky, sach ty, sach kem
dai hoi » dai hoc, dai hai, dai moi
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) OR (sach y)) nang dai hoi. hieu van cay dia ban thanh vai ((cau treo) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang dai hoi. hieu van cay dia ban thanh vai ((cau treo) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach y)) nang dai hoi. hieu van cay dia ban thanh vai ((cau treo) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach y)) nang dai hoi. hieu van cay dia ban thanh vai ((cau treo) or (cua tre))*.