Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"chat hoc tro snippets" » "chat hoa tro snippets", "chat thom tro snippets", "cho hoc tro snippets", "chat hoc trong snippets", "chat hoc tren snippets", "chat cuoc tro snippets"

Try widening your search to All Fields.

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