Rather than searching in Unity Dash for application, you can have a Classic menu on top of your desktop that would help you to search for things easily. It helps you navigate and access your applications.
ClassicMenu Indicator is a notification area applet (application indicator) for the top panel of Ubuntu’s Unity desktop environment.
Here is its screenshot:
Open Terminal (Ctrl + Alt + T) and write these commands:
sudo apt-add-repository ppa:diesch/testing
sudo apt-get update
sudo apt-get install classicmenu-indicator