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