Perhaps you should try some spelling variations:
"tran tro robot slippers" » "tran tao robot slippers", "tran cho robot slippers", "tran so robot slippers", "tran troi robot slippers", "tran tri robot slippers", "tran trong robot slippers", "tran tro robot slippery", "tran tro 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: (((("tran tro 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: (((("tran tro robot slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran tro robot slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran tro robot slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.