Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
su sach » so sach
vu sach » vu bach, vu khach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cac » va cac, vien cac
cac si » bac si, cac vi, cac di
vi cua » vai cua, di cua
x hoi » xa hoi, o hoi, x ho
si va » sai va, si da, su va

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 (vu sach)) ky nang x hoi. hieu ve cac si va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang x hoi. hieu ve cac si va hanh vi cua triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang x hoi. hieu ve cac si va hanh vi cua triet*.