Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dang hung den snippets" » "dang hung code snippets", "dang quang den snippets", "manh hung den snippets", "dang cong den snippets", "dang huong den snippets", "dang hung yen snippets", "dang hung dan snippets"
"dung java java snippets" » "dung va java 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: (((("dang hung den snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang hung den snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dang hung den snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang hung den snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.