Perhaps you should try some spelling variations:
"dung quang code snippets" » "dang quang code snippets", "luong quang code snippets", "dung luan code snippets", "dung quang de snippets", "dung quang code slippers"
"dung dbug code snippets" » "dung dong code snippets", "dung du code snippets", "dung dau code snippets", "dung dbug code slippers", "dung dbung code snippets", "dung dbugs code snippets"
"locating bug code snippets" » "locating bug code slippers", "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 dbug code snippets") or ("dung quang code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung dbug code snippets") OR ("dung quang code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung dbug code snippets") or ("dung quang code snippets"))) or ("locating bug code snippets"))*.