Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"khoa doi phi snippets" » "hoa doi phi snippets", "khoa hoi phi snippets", "khoa noi phi snippets", "khoa doi khi snippets", "khoa doi chi snippets", "khoa doi pho snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("khoa doi phi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa doi phi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("khoa doi phi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.