Perhaps you should try some spelling variations:
"phan vu hoan snippets" » "phan vu code snippets", "phan tu hoan snippets", "phan va hoan snippets", "pham vu hoan snippets", "phan vu hoang snippets", "phan su hoan snippets", "phan thu hoan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("phan vu hoan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("phan vu hoan snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("phan vu hoan snippets"))) or ("locating bug core snippets"))*.