The column that is being filtered is shown in square brackets [ ] after the Quick Search heading (in the example shown this is searching on the Customer Name column).
Using this as an example simply type Part or ALL of the customer name that you are searching for and click on the green search icon to filter the list to Customer Names CONTAINING the search text
Use the red cross icon to cancel the filter
Advanced Search Filter
Use the Select a data field to select which column you are filtering by
Select the type of filter
like Find entries that CONTAIN the given text
= Find the entry that matches the given text exactly
Enter the search criteria (the text that you are searching for)
Click on the green +button to add another level of search
for the additional search lines you can select between AND and OR for the connection between filters
Click on the green SEARCH button to activate the filter
Click on the red Clear button to clear all current filters