Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung may doc snippets" » "dung va doc snippets", "dung tai doc snippets", "mang may doc snippets", "dung may moc snippets", "dung day doc snippets", "dung may do 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 may doc 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 may doc snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung may doc snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung may doc snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.