Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"sach dan cho snippets" » "sach dan code snippets", "sach danh cho snippets", "sach dao cho snippets", "sach dat cho snippets", "sach san cho snippets", "sach dac cho snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("sach dan cho snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach dan cho snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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