You can use Search to narrow your search.
In the first field of the Search window, type the uncommon words you notice in the item. If you search using common words, the results of your search are likely too large to be very helpful.
To increase the speed of your search, select the folders that probably contain the item you are looking for.
If you cannot find the document or message, check your search criteria for misspelled words. Also, check the syntax of your search to make sure you are telling Search to search for exactly what you want.