Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh ban » thanh san, thanh van, thanh bac
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
dao ban » dao van, dao dan, tao ban
cua tre » cuu tre, cua triet, dua tren
ky anh » ky danh, ly anh, ty anh
van ca » van cau, van cua, dan ca
cua te » cua tu

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