Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"lan van ngan snippets" » "lan van nhan snippets", "lan von ngan snippets", "lan van nga snippets", "luan van ngan snippets", "lang van ngan snippets", "tan van ngan snippets", "lan van ngan 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: (((("lan van ngan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan van ngan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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