Perhaps you should try some spelling variations:
"trong quan trinh snippets" » "thong quan trinh snippets", "tong quan trinh snippets", "thong quang trinh snippets", "trong qua trinh snippets", "trong quan tinh snippets", "trong xuan trinh snippets", "trong quan 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 quan 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 quan trinh snippets") OR ("dung cac code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong quan trinh snippets ) or ( dung cac code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong quan trinh snippets") or ("dung cac code snippets"))) or ("locating bug code snippets"))*.