Perhaps you should try some spelling variations:
pham sach » pham anh, nam sach, pham hanh
van thanh » ban thanh, van tuan
dang xay » dang van, van xay
sach van » sach han, sach va, bach van
dang xa » lang xa, dang ha, dang va
hieu vu » hieu va, hieu ve, hieu su
vu pham » su pham, vi pham, vu kham
san cua » sang cua, ban cua, dan cua
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((dang xa) or (dang xay)) hoi. hieu vu pham sach van thanh san cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((dang xa) OR (dang xay)) hoi. hieu vu pham sach van thanh san cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((dang xa) or (dang xay)) hoi. hieu vu pham sach van thanh san cua tre*.