Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
hanh tai » thanh tai, hang tai, han tai
sach ty » sach y, sach tu, sach thu
nang xa » lang xa, nang ma, mang xa
qua cac » cua cac
va hanh » van hanh, va thanh, va danh
tai cua » thai cua, tai cuc, tri cua
cac lo » cac lop, cac co, cac bo
lo va » lo van, lao va, ly va

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: hoc sach ty ((nang xa) OR (nang x)) hoi. hieu qua cac lo va hanh tai cua triet~.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty ((nang xa) or (nang x)) hoi. hieu qua cac lo va hanh tai cua triet*.