Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"hoc bat cong snippets" » "hoc bat dong snippets", "hoc ban cong snippets", "hoc bot cong snippets", "hoc bai cong snippets", "hoc bao cong snippets", "hoc dat 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 java java snippets") or ("hoc bat cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("hoc bat cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( hoc bat cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("hoc bat cong snippets"))) or ("locating bug code snippets"))*.