Second Search not working

The search function is working at the first time. When I delete the search keyword and input a new keyword, there is no result. My document is Simplified Chinese. Will it cause the problem?

Hello,

We are sorry to hear that you have this issue. We cannot reproduce it and thus we need more info:
1. Which exact version of the GroupDocs.Viewer for .NET (assembly version) are you using?
2. The described issue occurs with any document, or only with specific document, or with all documents which are Simplified Chinese? If this happens only with specific document or with a defined set of documents which have some common features, please send us sample document for reproducing.
3. Which rendering mode are you using: image-based or HTML-based (.UseHtmlBasedEngine(true))?
4. Are you using some specific searching functions like the “.SearchForSeparateWords()” method? If yes, please give us a source code of your GroupDocs.Viewer widget.

Thanks and waiting for your reply.