Realtime knowledgebase search while visitor type

When customer asks a questions, it will be good to see possible answers from knowledgebase so we don't need to search them manually everytime. If it will be hard for server or database, then it should be optional. You can turn it on or of. Use realtime search ON/OFF.

It does not need to change it everytime but it can show 1 result. And if visitor asks a question again so it can show 2nd results and third so we can choose best answer.

It may show possible results and we can send result text to them quickly from sidebar