Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
cao tang » cao dang
ky tang » ky nang, ky dang, kho tang
ve pham » v pham, ve phan, ve phat
duc ban » duc tan, duc van, dua ban
su sac » su sach, su cac, su xac
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky tang) or (cao tang)) ma hoi. hieu ((ve pham) or (vi pham)) duc ban thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky tang) OR (cao tang)) ma hoi. hieu ((ve pham) OR (vi pham)) duc ban thanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sac ((ky tang) or (cao tang)) ma hoi. hieu ((ve pham) or (vi pham)) duc ban thanh dai cua triet*.