Perhaps you should try some spelling variations:
"dung quang phat snippets" » "dang quang phat snippets", "luong quang phat snippets", "dung luan phat snippets", "dung quang khai snippets", "dung hang phat snippets", "dung nang phat snippets", "dung quang phat 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 cac code snippets") or ("dung quang phat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung cac code snippets") OR ("dung quang phat snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dung cac code snippets") or ("dung quang phat snippets"))) or ("locating bug code snippets"))*.