Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"dung luan code snippets" » "dung luan cong snippets", "dung luan che snippets", "dung luan de snippets", "dung luan code slippers"
"han ping java snippets" » "han using java snippets", "shan ding java snippets", "han tong java snippets", "han ung java snippets", "han ping java slippers"

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 luan code snippets") or ("han ping java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung luan code snippets") OR ("han ping java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung luan code snippets ) or ( han ping java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung luan code snippets") or ("han ping java snippets"))) or ("locating bugs code snippets"))*.