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