Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
cham duc » pham duc, cham soc, pham duy
sang tao » hang tai
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
tu cach » tu cac
hieu ve » hieu van
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang
bo sach » co sach, hoc sach
vi su » va su, ve su, ki su

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 (bo sach)) ky sang tao hoi. ((hieu ve) or (hieu va)) cham duc ban thanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (bo sach)) ky sang tao hoi. ((hieu ve) OR (hieu va)) cham duc ban thanh vi su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (bo sach)) ky sang tao hoi. ((hieu ve) or (hieu va)) cham duc ban thanh vi su triet*.