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