Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan vien cho snippets" » "dan viet cho snippets", "nhan vien cho snippets", "danh viet cho snippets", "dan vien cheo snippets", "dan viec cho snippets", "dan vien 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: (((("dan vien cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan vien cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan vien cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan vien cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.