Perhaps you should try some spelling variations:
"toc chat cong snippets" » "toc chat code snippets", "toc chat chong snippets", "toc chat long snippets", "toc chat song snippets", "toc cham cong snippets", "hoc chat cong snippets", "doc chat cong 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 cong 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 cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( toc chat cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc chat cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.