Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cham duc » pham duc, cham soc, pham duy
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
lang ha » long ha
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang ma) OR (lang ha)) hoi. lieu va cham duc van hanh lai cua triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang ma) or (lang ha)) hoi. lieu va cham duc van hanh lai cua triet*.