new keys

Author: car031

logicaldoc-i18n/src/main/resources/i18n/messages.properties

@@ -2722,4 +2722,5 @@ answers = Answers
 classifier = Classifier
 tokensdetector = Tokens Detector
 addanswer = Add answer
-cannotunderstand = Sorry, I cannot understand what you mean
+cannotunderstand = Sorry, I cannot understand what you mean
+cannotfindanydoc = Sorry, I cannot find any document