Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh thu hoi snippets" » "doanh thu hoi snippets", "danh thuc hoi snippets", "danh tu hoi snippets", "danh thu hoai snippets", "danh thu phoi snippets", "danh thu hai 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: (((("danh thu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("danh thu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("danh thu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.