Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
thuc ban » thuoc ban, thuc dan, thu ban
ban can » ban dan, ban hang, ban hanh
su sach » so sach, vu sach
sach ly » sach y, sach lo, sach ty
ly hang » ly quang
van can » van canh, van ban, van cau
ca hoi » cau hoi, cua hoi, co hoi
vi cua » vai cua, di cua

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 ly hang ((ca hoi) or (xa hoi)). hieu ((van can) OR (ban can)) thuc ban thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly hang ((ca hoi) OR (xa hoi)). hieu ((van can) OR (ban can)) thuc ban thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly hang ((ca hoi) or (xa hoi)). hieu ((van can) OR (ban can)) thuc ban thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach ly hang ((ca hoi) or (xa hoi)). hieu ((van can) OR (ban can)) thuc ban thanh vi cua triet*.