I use the Find a lot in AX AOT. There are two not very well known ways of searching:
1. Find special characters
This is not very well known by others but I find very useful is using escape character to find what I want.
For example you want to search for code containing <SYS>. I just type in \<SYS\>.
2. Find AOT property
You can search for property values.
For example, in the AOT, if you search the Workflow node, and enter Module: *#Vendor in the Containing text field, only application objects that have a property named Module where the value is set to Vendor are displayed.
You can find a bit more info on msdn.