This looks correct. What is the mapping of found_in_rv field?
If type is set to text, querying for 9.0 will match both 9.0 and AGM 9.0 (so there is no need for the second OR condition.
If type is set to keyword, querying for 9.0 will only match 9.0.
Elasticsearch may have created found_in_rv.keyword for you as well, so you can try:
(found_in_rv.keyword:"9.0" OR found_in_rv.keyword:"AGM 9.0")
More information here: Timelion query - #2 by Stacey_Gammon