Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong te cong snippets" » "cong ty cong snippets", "cong ti cong snippets", "cong tu cong snippets", "cong tai cong snippets", "cong thi cong snippets", "cong thu 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: (((("cong te 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: (((("cong te cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong te cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong te cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.