Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cac thi hoi snippets" » "cac thi code snippets", "cac thoi hoi snippets", "cau thi hoi snippets", "can thi hoi snippets", "cac thi hoai snippets", "cac thi choi snippets", "cac thi hai 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: (((("cac thi hoi 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 thi hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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