Take a screenshot (home button and power button together). Find the items in the screenshot. For dark screens take screenshot after using a torch.

Note: Use this tip with caution as it requires that you leave the game to look at the picture you have taken! Your game may close out and lose your search without mistake streak. You could take a picture with another device if you have one and then pause it whilst you search, but again if you aren't paying attention your game may close out.