Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, tu cach
dua ban » dia ban, cua ban, qua ban
cay dua » chay dua, cay lua, ca dua
van cay » van cau, van bay, van ca
tang ma » mang may, tang van
sang ma » nang ma, sang tao, mang may
te sach » toc sach
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: ((tu sach) OR (te sach)) ky ((sang ma) or (tang ma)) hoa. hieu van cay dua ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky ((sang ma) OR (tang ma)) hoa. hieu van cay dua ban thanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ky ((sang ma) or (tang ma)) hoa. hieu van cay dua ban thanh dai cua tre*".