Perhaps you should try some spelling variations:
"dung ung cua snippets" » "dung trung cua snippets", "dung quang cua snippets", "dung chung cua snippets", "dung dung cua snippets", "dung uong cua snippets", "dung cung cua snippets"
"dung vbugss code snippets" » "dung vbugss core snippets", "dung vbungss code snippets", "dung vbugsss code snippets"
"locating bug code snippets" » "locating bug core 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 ung cua snippets") or ("dung vbugss code snippets"))) or ("locating bug code snippets"))~.
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• Adding a wildcard symbol may retrieve word variants: (((("dung ung cua snippets") or ("dung vbugss code snippets"))) or ("locating bug code snippets"))*.