Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"pham toan he snippets" » "pham toan code snippets", "pham tuan he snippets", "pham tan he snippets", "phap toan he snippets", "pham toan ho snippets", "pham toan ke snippets", "pham toan ve 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: (((("pham toan he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham toan he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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