minor fixes

Author: JV0812

docs/search/optimize-search-performance.md

@@ -96,7 +96,7 @@ _sourceCategory=foo
 
 ### Move terms from parse statement to source expression
 
-Adding the parsing terms in the source expression will help you enhance the search performace. A parse statement without `nodrop` drops the logs that could not parse the desired field. For example, `parse “completed * action“ as actionName` will remove logs that do not have **completed** and **action** terms. 
+Adding the parsing terms in the source expression will help you enhance the search performance. A parse statement without `nodrop` drops the logs that could not parse the desired field. For example, `parse “completed * action“ as actionName` will remove logs that do not have **completed** and **action** terms. 
 
 **Recommended approach:**
 
@@ -138,7 +138,7 @@ _sourceCategory=Prod/User/Eventlog
 
 ### Remove redundant operators
 
-Remove the search operators in the query that are not reffered or is not really required for the desired results. 
+Remove the search operators in the query that are not referred or is not really required for the desired results. 
 
 For example, let’s say you have a `sort` operator before an aggregation and this sorting does not make any difference to the aggregated results, resulting in reducing the performance.