Perhaps you should try some spelling variations:
ban hang » ngan hang
luy tre » luyen tre
tuc ban » thuc ban, truc ban, tu ban
luu tre » luu tru, cuu tre
ve chat » va chat, van chat
nang ma » tang ma, sang ma, nang cao
tu cao » cu cao, tu cac, vu cao
ma hoi » mai hoi, xa hoi, ma hoa
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cao ky nang ma hoi. hieu ((ve chat) OR (ve cac)) tuc ban hang va ((luu tre) OR (luy tre))~.
• Adding a wildcard symbol may retrieve word variants: tu cao ky nang ma hoi. hieu ((ve chat) or (ve cac)) tuc ban hang va ((luu tre) or (luy tre))*.