Perhaps you should try some spelling variations:
thanh dinh » thanh binh, thanh tinh, thanh vinh
cuu triet » cuu thiet, cua triet, cau triet
dinh cuu » dinh chi
qua ban » cua ban, qua quan
xua ban » xuat ban, cua ban, mua ban
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
nang o » nang co, nang ho, nang ro
va nam » van nam, ha nam, va nay
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ty) OR (sach y)) nang o hoi. hieu va nam ((xua ban) or (qua ban)) thanh dinh cuu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach y)) nang o hoi. hieu va nam ((xua ban) OR (qua ban)) thanh dinh cuu triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach y)) nang o hoi. hieu va nam ((xua ban) or (qua ban)) thanh dinh cuu triet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach y)) nang o hoi. hieu va nam ((xua ban) or (qua ban)) thanh dinh cuu triet*.