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