Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
thu sach » tu sach, thuat sach, thuoc sach
xang dai » xang dau, lang dai, hoang dai
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
dai hoi » dai hoc, dai hai, dai moi
ve phan » va phan, ke phan, vi phan
ve phat » va phat, te phat, de phat
va hanh » van hanh, va thanh, va danh
y xang » ty xang

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 y xang dai hoi. hieu ((ve phan) OR (ve phat)) day va hanh lai ((chau triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y xang dai hoi. hieu ((ve phan) OR (ve phat)) day va hanh lai ((chau triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y xang dai hoi. hieu ((ve phan) OR (ve phat)) day va hanh lai ((chau triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: thu sach y xang dai hoi. hieu ((ve phan) OR (ve phat)) day va hanh lai ((chau triet) or (su triet))*.