Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
cua triet » cua viet, su triet, va triet
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va
van cua » vang cua, ban cua, dan cua
du ban » dua ban, duc ban, du bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dang xa hoi. ((hieu va) or (hieu qua)) cac du ban thanh van cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xa hoi. ((hieu va) OR (hieu qua)) cac du ban thanh van cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xa hoi. ((hieu va) or (hieu qua)) cac du ban thanh van cua triet*.