Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc manh cao snippets" » "suc manh cao snippets", "duc anh cao snippets", "duc minh cao snippets", "duc mach cao snippets", "duc manh cam snippets", "duc doanh cao snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duc manh cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc manh cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("duc manh cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.