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