Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
va cham » va chat, va tham
lai cua » dai cua, hai cua, lai chau
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ve cham » ve chat, vu cham, ve chim
xang o » lang o, tang o, dang o
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: tu sach ty xang o hoi. hieu ((ve cham) or (va cham)) duc ((van hanh) or (van minh)) lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty xang o hoi. hieu ((ve cham) OR (va cham)) duc ((van hanh) OR (van minh)) lai cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty xang o hoi. hieu ((ve cham) or (va cham)) duc ((van hanh) or (van minh)) lai cua triet*.