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