Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
pham day » phap day, pham duy, pham xay
qua pham » quan pham, quy pham, qua cham
sach ty » sach tu, sach thu, xach tay
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
ma hoi » xa hoi, ma hoa, me hoi

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