Perhaps you should try some spelling variations:
"dung dung chat snippets" » "dung dung code snippets", "duong dung chat snippets", "ung dung chat snippets", "dung ung chat snippets", "dung dung nhat snippets", "dung luong chat snippets", "dung dung cho 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: (((("dung dung chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung chat snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung dung chat snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dung chat snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.