Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"so dong quoc snippets" » "so dang quoc snippets", "so dong duoc snippets", "so hoang quoc snippets", "co dong quoc snippets", "o dong quoc snippets", "so dung quoc snippets", "so dong quoc 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: (((("so dong quoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("so dong quoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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