Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"using da co snippets" » "using a co snippets", "using data co snippets", "using raw co snippets", "using dau co snippets", "using dac co snippets", "using va co 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: (((("using da co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using da co snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using da co snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using da co snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.