Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dung qua de snippets" » "duong qua de snippets", "dung quan de snippets", "dung cua de snippets", "dung qua da snippets", "dung qua di snippets", "dung qua du 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 qua de 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 qua de snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung qua de snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung qua de snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.