Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"cao anh so snippets" » "cao anh code snippets", "cao dang so snippets", "cao tang so snippets", "cao bang so snippets", "cao anh son snippets", "cao anh co snippets"

Try widening your search to All Fields.

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