Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thu sach » tu sach, thuat sach, thuoc sach
hanh hai » thanh hai, nhanh hai, hang hai
sach thu » sach thue, sach thieu, sach tham
su triet » su viet, su tien, ve triet
ve pham » vi pham, v pham, ve phan
va hanh » van hanh, va thanh, va danh
mang xa » lang xa, mang may, dang xay
hieu ve » hieu va, hieu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach thu ((mang xa) or (nang x)) hoi. hieu ve pham duc va hanh hai ((cua triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thu ((mang xa) OR (nang x)) hoi. hieu ve pham duc va hanh hai ((cua triet) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: thu sach thu ((mang xa) or (nang x)) hoi. hieu ve pham duc va hanh hai ((cua triet) or (su triet))*.