Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung mo minh slippers" » "dung co minh slippers", "dung cho minh slippers", "dung von minh slippers", "dung mot minh slippers", "dung mo hinh slippers", "dung do minh slippers", "dung mo minh slippery", "dung mo minh grippers"
"locating bug code snippets" » "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: (((("dung mo minh slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung mo minh slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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