If you want to use search option via android app, there are several ways to do that.

First way, is through the main “Deals” screen, by tapping the magnifying glass in the upper right side of your screen.

After that, you will be able to search through the entire organization. You can search workflows, deals and contacts, the screen showing will be like the screenshot below.

Second way, is to use search option throughout tasks. You will need to tap on “Tasks” icon, at the bottom of your screen. Once entered task section you can search, by tapping on magnifying glass, through available tasks.

Third way, is to tap on “Contacts” icon, and then on the magnifying glass. Once done, you can search throughout your contacts and then type in the first or the last name of the contact you are searching for (second screenshot).