Perhaps you should try some spelling variations:
"ton duc toan snippets" » "ton duc code snippets", "ton duc tan snippets", "ton duc ton snippets", "ton duc hoan snippets", "tran duc toan snippets", "tong cuc toan snippets", "tinh duc toan snippets"
"locating bug core snippets" » "locating bug code 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: (((("python using java snippets") or ("ton duc toan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("ton duc toan snippets"))) OR ("locating bug core snippets")).
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