As Stefan has shown you, the LIKE operator can be used, but are the two
possible values legitimate, i.e. does each mean something different, or are
they merely inconsistent versions of the same term? If the latter you should
aim to remove the inconsistency which you can do by changing them all to the
same with an 'update' query, e.g.
UPDATE YourTable
SET YourField = "neg"
WHERE YourField = "nega";
to change them all to 'neg'.
To enforce consistency you should really have another table in which 'neg'
appears just once in a single row, along with other unique values in other
rows. By relating this to your current table and enforcing referential
integrity only legitimate values can be entered into the column in your
current table.
When entering new data into your current table you can then use a combo box
in your data entry form to select a value from the 'referenced' table.
Ken Sheridan
Stafford, England