Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
ban thanh » ban hanh, ban hang
dang dai » dang hai, dang bai, dang dan
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dai hoa » dai khoa, dai hoc, dai hoi
dao ban » dao van, dao dan, tao ban
cua tre » cuu tre, cua triet, dua tren
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 dai hoa. hieu van ca dao ban thanh phan ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang dai hoa. hieu van ca dao ban thanh phan ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang dai hoa. hieu van ca dao ban thanh phan ((cua tre) or (cua te))*.