Perhaps you should try some spelling variations:
"trong anh trinh snippets" » "truong anh trinh snippets", "trong nganh trinh snippets", "trong doanh trinh snippets", "trong hanh trinh snippets", "trong anh tinh snippets", "trong thanh trinh snippets", "trong anh trinh 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: (((("trong anh trinh snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong anh trinh snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trong anh trinh snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))*.