I often have vacuum hoses plugged with chips. However the chips are cast iron which has short chips vs steel that has curlies. If raising the hose vertically while sqeezing at obstruction doesn't work, I try reversing the hose. If all else fails, I take it to the wash rack and use a water hose and rag to blow the chips out.
With steel curlies, I was a bit suprized that the op could get enough sucked up to plug the hose but then I don't know the nature of the cuts or chips since drilling and interrupted cuts can make something a vacuum can try to handle.
Wes