Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh loc » thanh loi, thanh hoc, thanh long
cau tren » cu tren, dau tren, ca tren
thu sach » thuat sach, thuoc sach, thu hoach
thi hanh » thi thanh
thi van » thi lan, thi nang
danh di » danh du, xanh di, danh dien
va danh » va dinh, va dan, va hanh
tu sach » su sach, te sach, tu cach
va hoi » va hoc, va hoa
loc va » hoc va, luc va
di cau » da cau, diem cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) thi hanh ((va hoi) OR (xa hoi)). thi van thanh loc va danh di cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) thi hanh ((va hoi) OR (xa hoi)). thi van thanh loc va danh di cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) thi hanh ((va hoi) OR (xa hoi)). thi van thanh loc va danh di cau tren*.