Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"can hoc sach snippets" » "can hoc sinh snippets", "can hoc cac snippets", "can hoc anh snippets", "van hoc sach snippets", "dan hoc sach snippets", "cao hoc sach snippets"

Try widening your search to All Fields.

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