Perhaps you should try some spelling variations:
"dung dung thu snippets" » "duong dung thu snippets", "ung dung thu snippets", "dung ung thu snippets", "dung dung phu snippets", "dung dung thi snippets", "dung dung thu slippers"
"dung vbug code snippets" » "dung vung code snippets", "dung vbug code slippers", "dung vbung code snippets", "dung vbugs code snippets"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung dung thu snippets") or ("dung vbug code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dung thu snippets") OR ("dung vbug code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung dung thu snippets") or ("dung vbug code snippets"))) or ("locating bug code snippets"))*.