Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung dan can snippets" » "dung dat can snippets", "dung san can snippets", "tung dan can snippets", "dung dan chan snippets", "dung dan canh snippets", "dung dan ca 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 dan can snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dan can snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung dan can snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung dan can snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.