Fix typos

docs/en/reference/known-vendor-issues.rst

@@ -77,9 +77,9 @@ Buffered Queries and Isolation
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Careful if you execute a ``SELECT`` query and do not iterate over the
-statements results directly. ``UPDATE`` statements executed before iteration
+statements results immediately. ``UPDATE`` statements executed before iteration
 affect only the rows that have not been buffered into PHP memory yet. This
-breaks the SERIALIZABLE transction isolation property that SQLite supposedly
+breaks the SERIALIZABLE transaction isolation property that SQLite supposedly
 has.
 
 DateTime