Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"cac hoi luan snippets" » "cac hoa luan snippets", "cac hoc luan snippets", "cac khoa luan snippets", "cac thoi luan snippets", "cac khoi luan snippets", "cau hoi luan snippets"

Try widening your search to All Fields.

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