Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
long ha » dong ha, cong ha, dong hoa
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
va cam » va cham, va cac, va cao

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 y ((nang ma) or (long ha)) hoi. lieu va cam duc van hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (long ha)) hoi. lieu va cam duc van hanh lai cua triet*.