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