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