You havent menioned which version of DA you are using but....
If you search for "XYZ" in DA9/10 then the search will look for XYZ, so your search of "212-M50-0599" should produce results for the EXACT phrase 212-M50-0599 rather than 212 M50 0599.
If you search for XYZ* then the search will look for any phrase starting with XYZ with any amount of characters after that. You are also able to use other wildcards to replace a single character as well as other options.
Here is the reviewers guide for DA9 - http://www.symantec.com/docs/DOC2859
If you look at page 17(on the above doc) onwards you will find the section related to search criterior, the part relating to "specific searches" and wildcards is on page 19 through to 21, look for the section named 'Search Term Selection'
Reviews guide for DA10 - http://www.symantec.com/docs/DOC5994
Have a look at this link which holds all of the documentation for EV/DA/CA 9 incase it is of help to you - http://www.symantec.com/docs/TECH140748
And EV/DA 10 - http://www.symantec.com/docs/DOC5804