Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"doi thoi bac snippets" » "doi thoai bac snippets", "moi thoi bac snippets", "do thoi bac snippets", "doi tho bac snippets", "doi hoi bac snippets", "doi thoi mac snippets", "doi thoi bac slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("doi thoi bac snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("doi thoi bac snippets"))) or ("locating bug code snippets"))*.