Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dang nghe so snippets" » "lang nghe so snippets", "nang nghe so snippets", "cong nghe so snippets", "dang nghe son snippets", "dang nghe co snippets", "dang nghiep so 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: (((("dang nghe so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang nghe so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("dang nghe so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.