Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sang lai » sang tai, sang lap, sang mai
thanh vi » hanh vi, thanh va, thanh ve
mang lai » mang lam, mang luoi, dang loai
hieu su » hieu sau, hieu so, hieu suat
tieu su » thieu so
vi cua » vai cua, di cua
xu ban » xuc ban, tu ban, vu ban
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
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 lai) OR (mang lai)) hoi. ((hieu su) or (tieu su)) chao xu ban thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((sang lai) OR (mang lai)) hoi. ((hieu su) OR (tieu 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 lai) OR (mang lai)) hoi. ((hieu su) or (tieu su)) chao xu ban thanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((sang lai) OR (mang lai)) hoi. ((hieu su) or (tieu su)) chao xu ban thanh vi cua te*.