Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
hieu su » hieu sau, tieu su, hieu so
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
nang o » nang co, nang ho, nang ro
vi cua » vai cua, di cua
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: ((su sach) or (thu hoach)) ky nang o hoi. hieu su ((pham duc) or (cam xuc)) va danh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thu hoach)) ky nang o hoi. hieu su ((pham duc) OR (cam xuc)) va danh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thu hoach)) ky nang o hoi. hieu su ((pham duc) or (cam xuc)) va danh vi cua triet*.