Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
lai cua » dai cua, hai cua, lai chau
duc van » duc va, duc tan, duc manh
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tu sach » thu sach, tu cach, vu sach
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
su sach » so sach, vu sach
nang o » nang co, nang ho, nang ro
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) or (su sach))) or (te sach)) ty nang o hoi. hieu ve cham duc van hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((tu sach) OR (su sach))) OR (te sach)) ty nang o hoi. hieu ve cham duc van hanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((((tu sach) or (su sach))) or (te sach)) ty nang o hoi. hieu ve cham duc van hanh lai cua triet*.