Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
dang mat » dang vat, dang mau, dung mat
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
mat hoa » ma hoa, mai hoa, chat hoa
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
ca dua » cay dua, ca cua, ca lua
ca da » ca dao, ca dan, ca dam

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 ky dang mat hoa. hieu van ((ca dua) OR (ca da)) ban thanh vai ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang mat hoa. hieu van ((ca dua) OR (ca da)) ban thanh vai ((cuu tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang mat hoa. hieu van ((ca dua) OR (ca da)) ban thanh vai ((cuu tre) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang mat hoa. hieu van ((ca dua) OR (ca da)) ban thanh vai ((cuu tre) or (cua tre))*.