Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"thu ngan li snippets" » "tu ngan li snippets", "tai ngan li snippets", "vu ngan li snippets", "thu ngan lan snippets", "thu nganh vi snippets", "thu ngao loi snippets", "thu ngan li 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: (((("thu ngan li snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu ngan li snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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