Perhaps you should try some spelling variations:
"dung phuc se snippets" » "duong phuc se snippets", "dung phu se snippets", "dong phuc se snippets", "dung phuc sen snippets", "dung phuc su snippets", "dung phuc le 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 phuc se 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 phuc se snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung phuc se snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung phuc se snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.