Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung san cong snippets" » "dong san cong snippets", "dung sai cong snippets", "dung luan cong snippets", "dung sang cong snippets", "dung van cong snippets", "dung ban cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 san cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung san cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung san cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung san cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.