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