Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dang hat dan slippers" » "dang nhat dan slippers", "dang phat dan slippers", "dang vat dan slippers", "dang hat van slippers", "dang mat dan slippers", "dang nhat danh slippers", "dang hat dan slippery", "dang hat dan grippers"
"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: (((("dang hat dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang hat dan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang hat dan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang hat dan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.