Perhaps you should try some spelling variations:
"dung vbug code snippets" » "dung vung code snippets", "dung vbung code snippets", "dung vbugs code snippets"
"dung dat tap slippers" » "dung va tap slippers", "dung tai tap slippers", "dung dat tai slippers", "dung xuat tap slippers", "dung dat ngap slippers", "dung dat tap slippery", "dung dat tap grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung vbug code snippets") or ("dung dat tap slippers"))) or ("locating bug code snippets"))~.
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