Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"duc toan cho snippets" » "duc tan cho snippets", "duc ton cho snippets", "duc hoan cho snippets", "duc toan cao snippets", "duc toan chi snippets", "duc toan ho 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: (((("dung java java snippets") or ("duc toan cho snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("duc toan cho snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( duc toan cho snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("duc toan cho snippets"))) or ("locating bug code snippets"))*.