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