Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh vi » hanh vi, thanh va, thanh ve
sang tao » hang tai
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
duc ban » duc tan, dua ban, duc man
tu cach » tu cac
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
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: ((tu cach) or (so sach)) ky sang tao hoi. hieu ve cham ((duc ban) OR (duc van)) thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (so sach)) ky sang tao hoi. hieu ve cham ((duc ban) OR (duc van)) thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (so sach)) ky sang tao hoi. hieu ve cham ((duc ban) OR (duc van)) thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (so sach)) ky sang tao hoi. hieu ve cham ((duc ban) OR (duc van)) thanh vi cua triet*.