Like "" & [forms]![YourForm]![TextABC] & "*"
That finds all records based on the first letters entered. For example if Ch was in TextABC it will get Chris, Christopher, Chime and chick etc.
Like "*" & [forms]![YourForm]![TextABC] & "*"
That finds where Ch occurs so it would get Chris, Nicolas and Richard
[forms]![YourForm]![TextABC] gets on the exact entry and so Chris will only get the records with Chris and not Christopher.
>=[Forms]![YourForm]![TextABC] And <=[Forms]![YourForm]![TextABC] That one is obvious.
To get your varaition of entries such as 7 Eleven, Seven Eleven as a common entry there are different ways.
The IIF() and Switch() are done in a query and create a new field but they are limited to 7 variations. IIF is dones as Nested IIF which is combining IIFs
You can also do in VBA
If "whatever" Then
"Do this"
End If
The "whatevers" would be each variation and the "do this" would be placing the value you want in the field required. Thus the "whatevers" will have 7 Eleven, Seven Eleven, Seven 11 etc and the "do this" will all be 711 or whatever you chooses. You can do as many as you like. The limitation is you can't make a query field with it. It is done on a form.
The same thing can be done with the macro SetValue action and using the condition column.
You can make a Select Case function in a module and then call the function in a new query field.
The other type of approcah is to make a table that holds the values. For example, you might make a copy of your table that has the Seven 11 type entries and append the original table to the copy. However, in the copy of the table you have the field that receives the Seven 11 type entries set so it won't take duplicates. You only really need to fields in the new table, one for the Seven 11 entries and the other to enter what you want to call them. One of the things you can then do is make the Seven 11 field a primary key field and then update the main table with the common entry you have used for each of the variations. This type of thing is often done as "one off" for existing data and you then change your DB so as to make sure Seven Eleven, Seven 11 etc can be only entered one way. This could be easily done by using a combo box to make the entry and the combo is based on the table with the entries that required.
As I said in my previous post there can be a bit of fiddling about with this sort of thing so you need to do a few searches.
I suspect your best option is to create the table to produce the list of common entries based on the variations.