Perhaps you should try some spelling variations:
"tran trong tan slippers" » "gian trong tan slippers", "quan trong tan slippers", "tran trong san slippers", "tran trong quan slippers", "tran trong cac slippers", "tran trong tan slippery", "tran trong tan grippers"
"dung java java snippets" » "dung va java 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: (((("tran trong tan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran trong tan slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran trong tan slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran trong tan slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.