Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
hoc sach » hoc sinh, hoc cac, hoc anh
thanh do » thanh de, thanh pho, thanh hoa
sut tien » su tien, tat tien, vu tien
so sach » so sanh, bo sach, co sach
cac do » cac don, cac doi, cac du
do van » dao van, vo van, so van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (hoc sach)) ky nang x ho. lieu va cac do van thanh do sut tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (hoc sach)) ky nang x ho. lieu va cac do van thanh do sut tien.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (hoc sach)) ky nang x ho. lieu va cac do van thanh do sut tien*.