Perhaps you should try some spelling variations:
"dung hoi trach snippets" » "dung hoi trac snippets", "dung bo trach snippets", "dung co trach snippets", "duong hoi trach snippets", "dung hoai trach snippets", "dung thoi trach snippets", "dung hoi trach slippers"
"dung cac code snippets" » "luong cac code snippets", "dung cho code snippets", "dung tai code snippets", "dung cac cong snippets", "dung cac co snippets", "dung cac che snippets", "dung cac code slippers"
"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 hoi trach snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hoi trach snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
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