Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao vien cao snippets" » "dao viet cao snippets", "dan vien cao snippets", "dao tien cao snippets", "dao vien cac snippets", "dao vien dai snippets", "dao vien da 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: (((("dao vien 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: (((("dao vien cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao vien cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao vien cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.