Step 1.
Only change on street line layer, because this is target on cross street search.
Do not change on address point layer, no change on POI layer
Step 2.
re-run everything, test again
3 letter works, but did not show full street name at popup
Step 3.
search address point is fine, does not affected by 3 letter street name
Step 4.
try again
Step 5.
3 letter works
Step 6.
full street name works
Step 7.
Step 8.
Step 9.
Step 10.
Step 11.
Step 12.
Step 13.
Step 14.
Step 15.
Step 16.
Step 17.
Step 18.
Step 19.
Step 20.