Perhaps you should try some spelling variations:
"toc chat long snippets" » "toc chat code snippets", "toc chat luong snippets", "toc hai long snippets", "toc ha long snippets", "toc cham long snippets", "hoc chat long snippets", "doc chat long snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("toc chat long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc chat long snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( toc chat long snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc chat long snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.