Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
ky sang » ky nang, ky dang, ky tang
lap hoi » lai hoi, lap hai, luat hoi
hieu su » hieu sau, tieu su, hieu so
su chao » su cao, sau chan
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
xu ban » xuc ban, tu ban, vu ban
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky sang ((lap hoi) OR (lap doi)). hieu su chao xu ban thanh vi cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ((lap hoi) OR (lap doi)). hieu su chao xu ban thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((lap hoi) OR (lap doi)). hieu su chao xu ban thanh vi cua te*.