Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"sach viet ky snippets" » "bach viet ky snippets", "cach viet ky snippets", "anh viet ky snippets", "sach viet my snippets", "sach viet ty snippets", "sach viet duy snippets", "sach viet ky 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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• Performing a fuzzy search may retrieve terms with similar spellings: (((("sach viet ky snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach viet ky snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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