Hello,
Despite of your analysis, I'm still believe that problem is related to StopWords for the entity table. Please, execute the following command into SQL (replacing the language ID if necessary):
For English language
SELECT *
FROM sys.fulltext_system_stopwords
WHERE language_id = 1033;
For Portuguese language
SELECT *
FROM sys.fulltext_system_stopwords
WHERE language_id = 1046;
You also can use the following query in order to identify if the word "Eder" is a "noise word":
SELECT * FROM sys.dm_fts_parser (' "Eder" ', 1033, 0, 0)
SELECT * FROM sys.dm_fts_parser (' "Eder" ', 1046, 0, 0)
To mitigate this issue, please try to apply the action plan below:
1. Active the Full Text Search for Quick Finds for Dynamics 365
2. Access the SQL server and expand the D365 database
3. Locate the entity table associated to entity involved with you search
4. Right click in the table > Full-text-index > Properties
5. Change the value for Full-test Index Stoplist to "Off"
6. Perform a new text
Thanks,