Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phan van can snippets" » "phan van code snippets", "pham van can snippets", "thanh van can snippets", "luan van can snippets", "phan van canh snippets", "phan van ban snippets", "phan ban can 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: (((("phan van can snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan van can snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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