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
mai khoi » mai khoa, tai khoa, cac khoi
tuc ban » thuc ban, truc ban, tu ban
su sach » so sach, vu sach
mai hoi » dai hoi, lai hoi, mai doi
y nang » ky nang, ly nang, v nang
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai
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 y nang ((mai hoi) OR (mai khoi)). lieu ((va cam) or (va cao)) tuc ban thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ((mai hoi) OR (mai khoi)). lieu ((va cam) OR (va cao)) tuc ban thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((mai hoi) OR (mai khoi)). lieu ((va cam) or (va cao)) tuc ban thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((mai hoi) OR (mai khoi)). lieu ((va cam) or (va cao)) tuc ban thanh vi cua triet*.