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