Perhaps you should try some spelling variations:
"phan tan robot slippers" » "phan tao robot slippers", "phan tay robot slippers", "phan a robot slippers", "phan van robot slippers", "phan tap robot slippers", "phan lan robot slippers", "phan tan robot slippery", "phan tan robot 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 tan robot 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 tan robot slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan tan robot slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan tan robot slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.