Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"phung ho cong snippets" » "phung thi cong snippets", "tung ho cong snippets", "hung hoa cong snippets", "phung hoc cong snippets", "phung cho cong snippets", "phung hoa 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: (((("phung ho 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: (((("phung ho cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phung ho cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phung ho cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.