Perhaps you should try some spelling variations:
"trong san trinh snippets" » "trong cac trinh snippets", "cong san trinh snippets", "dong san trinh snippets", "trong dan trinh snippets", "trong san tinh snippets", "trong van trinh snippets", "trong san 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 san 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 san 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 san trinh snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))*.