Perhaps you should try some spelling variations:
"dung lang cung snippets" » "dung lang code snippets", "dung dang cung snippets", "dung nang cung snippets", "dung land cung snippets", "dung hang cung snippets", "dung mang cung snippets", "dung tang cuong 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 java java snippets") or ("dung lang cung snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung lang cung snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung lang cung snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung lang cung snippets"))) or ("locating bug core snippets"))*.