Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"dung toan phan slippers" » "dung doanh phan slippers", "dung thang phan slippers", "dung thanh phan slippers", "dung toan ban slippers", "dung hoa phan slippers", "dung toan phan slippery", "dung toan phan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dang java java snippets") or ("dung toan phan slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang java java snippets") OR ("dung toan phan slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( dung toan phan slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("dung toan phan slippers"))) or ("locating bug code snippets"))*.