Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"con dung cac snippets" » "con duong cac snippets", "cong dung cac snippets", "con rung cac snippets", "con luong cac snippets", "con dung cho snippets", "con dung tai 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: (((("con dung cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("con dung cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con dung cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con dung cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.