Perhaps you should try some spelling variations:
"hoc thu cong snippets" » "hoc thu code snippets", "hoc thuc cong snippets", "hoc thuy cong snippets", "hoc tu cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"

Try widening your search to All Fields.

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