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