in the Dimensions tab you will see only data that is accurate. If the data can not be identified, it will be at the bottom under the row 'other'.
Especially if you have combined search and display network in the same campaign
Yes you can expect some data discrepancy here in Dimensions. You can see links below for more information-
User locations data
The geographic data in your AdWords statistics table may vary somewhat from other data in your account or sources such as third-party tracking or web logs. Click the section below to see a few possible reasons.
Also you can see “reasons for data variation” section at the bottom of the above page.
Search terms data
Keep in mind that you’ll only see search terms that were used by people at least 24 hours ago and have either received clicks in the past 30 days or were searched for by a significant number of people. Any search terms that did not meet this criteria will be summed up in the 'Other search terms' row.
Hope this helps