Perhaps you should try some spelling variations:
"nhap mon toan snippets" » "nhap mon code snippets", "nhap manh toan snippets", "nhap minh toan snippets", "nhap nin toan snippets", "phap mon toan snippets", "nhan mon toan snippets", "nhat mon toan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"

Try widening your search to All Fields.

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