Search with mathematical operators/symbols

Hello,
we have in total 3177 entries in RDM (RDP, sub connections etc.). The bigger part of these entries are links to existing entries; for example an entry can be linked in 20 different groups/folder.
And we have many entries with similar names. I would like to explain it with a short example (folders and content of each folder):
folder z
- entry: abc_def
- entry: def
folder y
- entry: c_def
- entry: ab_def_xyz
folder x
- entry: abc_def
folder w
- entry: def
folder v
- entry: abc_def_gh
etc.
When I search for a word (e.g. "def"), I get as result all the entries, that contain "def" in the name. That's very nice :) But sometimes I would like to find only the entries that are exactly called "def" and not other entries with "def" in the middle/end of the name.
So, I have two questions/wishes:
1) Is there a possibility to search exactly for a word? For example with a sympol or mathematical operator? Like $def$
2) An other function/possibility to search easier: For example I search for "ab*d" and I get as a result all the entries, that begin with "ab" and contain a "d". In my example, I would get the following result:
folder z
- entry: abc_def
folder y
- entry: ab_def_xyz
folder x
- entry: abc_def
folder v
- entry: abc_def_gh
I didn’t know how I could explain it better. I hope that my description is okay and understandable :)
Please let me know, if you have any questions.


regards,
Aysun