Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dung cac thin slippers" » "luong cac thin slippers", "dung cho thin slippers", "dung tai thin slippers", "dung cac thi slippers", "dung cach thien slippers", "dung cac chien slippers", "dung cac thin slippery", "dung cac thin 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: (((("dung java java snippets") or ("dung cac thin slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("dung cac thin slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( dung cac thin slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("dung cac thin slippers"))) or ("locating bug code snippets"))*.