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