fix a few typos

Author: timsander1

articles/cosmos-db/sql-query-contains.md

@@ -69,7 +69,7 @@ For example, consider two properties: town and country. The cardinality of town
     SELECT * FROM c WHERE CONTAINS(c.country, "States", false)
 ```
 
-The first query will likely use more RUs than the second query because the cardinality of town is higher than city.
+The first query will likely use more RUs than the second query because the cardinality of town is higher than country.
 
 ## Next steps
 

articles/cosmos-db/sql-query-endswith.md

@@ -69,7 +69,7 @@ For example, consider two properties: town and country. The cardinality of town
     SELECT * FROM c WHERE ENDSWITH(c.country, "States", false)
 ```
 
-The first query will likely use more RUs than the second query because the cardinality of town is higher than city.
+The first query will likely use more RUs than the second query because the cardinality of town is higher than country.
 
 ## Next steps
 

articles/cosmos-db/sql-query-stringequals.md

@@ -8,7 +8,7 @@ ms.date: 05/20/2020
 ms.author: tisande
 ms.custom: query-reference
 ---
-# CONTAINS (Azure Cosmos DB)
+# STRINGEQUALS (Azure Cosmos DB)
 
  Returns a Boolean indicating whether the first string expression matches the second.