Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"con rung cac snippets" » "con trung cac snippets", "kon rung cac snippets", "lon rung cac snippets", "con dung cac snippets", "con vung cac snippets", "con cung cac 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 rung 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 rung cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con rung cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con rung cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.