Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"anh thi ngan snippets" » "anh tai ngan snippets", "anh thu ngan snippets", "anh thi nga snippets", "anh tho ngan snippets", "dinh thi ngan snippets", "dang thi ngan snippets", "anh thi 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: (((("anh thi 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: (((("anh thi ngan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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