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

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) or (ky nang)) lap hoi. ((hieu su) OR (hieu sau)) chao xu ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky sang) OR (ky nang)) lap hoi. ((hieu su) OR (hieu sau)) chao xu ban thanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky sang) or (ky nang)) lap hoi. ((hieu su) OR (hieu sau)) chao xu ban thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky sang) or (ky nang)) lap hoi. ((hieu su) OR (hieu sau)) chao xu ban thanh vi cua te*.