Click on Speed Up for the research or building currently being built. Click on Ask for Help.
The next pop up box will show the Facebook dialog box, right click the "Your name needs your help..." and click on Copy Link Location or Copy URL (depending on your system).
Go to TinyURL.com and paste the link into the box and click Make TinyURL. Copy and paste that to your alliance chat box, global, or email list.
Be careful though. Moderators are constantly looking for people who do this and may silence or ban you from the game. This is not allowed in the TOS.