Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"bai cac chat snippets" » "bai cao chat snippets", "bai cac thuat snippets", "bai cac nha snippets", "tai cac chat snippets", "bai ca chat snippets", "vai cac chat snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java core snippets") or ("bai cac chat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("bai cac chat snippets"))) OR ("locating bug code snippets")).
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