Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
mai hoi » mai khoi, dai hoi, lai hoi
ky tang » ky nang, ky dang, kho tang
duc ban » duc tan, duc van, dua ban
su cac » tu cac, su cao, su can
va cam » va cham, va cac, va cao
ve cam » ve cham, ve cac, ve cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky tang ((mai hoi) or (xa hoi)). hieu ((ve cam) OR (va cam)) duc ban thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky tang ((mai hoi) OR (xa hoi)). hieu ((ve cam) OR (va cam)) duc ban thanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky tang ((mai hoi) or (xa hoi)). hieu ((ve cam) OR (va cam)) duc ban thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su cac ky tang ((mai hoi) or (xa hoi)). hieu ((ve cam) OR (va cam)) duc ban thanh dai cua triet*.