Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"san viet cho snippets" » "san viet code snippets", "gian viet cho snippets", "anh viet cho snippets", "san viec cho snippets", "san viet co snippets", "san viet theo 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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