Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"using sat from slippers" » "using data from slippers", "using a from slippers", "using raw from slippers", "using sat nhom slippers", "using sp from slippers", "using sat from slippery", "using sat from 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 ("using sat from slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("using sat from slippers"))) OR ("locating bug code snippets")).
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