configuration: fixing typos

configuration.adoc has some minor typos in it, this commit fixes
that.

Change-Id: Id84238b89e5deeac99c043b79b26c7e7b8b8534b
diff --git a/doc/manuals/chapters/configuration.adoc b/doc/manuals/chapters/configuration.adoc
index bcf3ad7..6fc61c7 100644
--- a/doc/manuals/chapters/configuration.adoc
+++ b/doc/manuals/chapters/configuration.adoc
@@ -72,7 +72,7 @@
 ==== Downlink TBF idle time
 
 After a down-link TBF is idle (all data in the current LLC downlink
-queue for thi MS has been transmitted), we can keep the TBF established
+queue for the MS has been transmitted), we can keep the TBF established
 for a configurable time.  This avoids having to go through a new one or
 two phase TBF establishment once the next data for downlink arrives.
 
@@ -94,7 +94,7 @@
 
 ==== Forcing two-phase access
 
-If the MS is using for a single-phase access, you can still force it to
+If the MS is using a single-phase access, you can still force it to
 use a two-phase access using the `two-phase-access` VTY configuration
 command at the `pcu` VTY config node.