Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"danh chu duc snippets" » "doanh chu duc snippets", "danh cho duc snippets", "danh cau duc snippets", "danh thu duc snippets", "danh chua duoc snippets", "danh cuu duoc snippets", "danh chu duc slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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