Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung hai can snippets" » "dung tai can snippets", "dung ha can snippets", "dung sai can snippets", "dung hai tan snippets", "dung hai van snippets", "dung hau can 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 hai can 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 hai can snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hai can snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hai can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.