Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cuon lang phi slippers" » "chong lang phi slippers", "cuong bang phi slippers", "cuon danh phi slippers", "cuon lang phu slippers", "cuon lang chai slippers", "cuon lang ha slippers", "cuon lang phi slippery", "cuon lang phi 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 ("cuon lang phi slippers"))) or ("locating bug code snippets"))~.
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