Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"manh toan tran slippers" » "thanh toan tran slippers", "anh tuan tran slippers", "tinh toan tran slippers", "manh thoan tran slippers", "manh tan tran slippers", "manh hoan tran slippers", "manh toan tran slippery", "manh toan tran 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 ("manh toan tran slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("manh toan tran slippers"))) OR ("locating bug code snippets")).
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