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