Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van den cau snippets" » "van de cau snippets", "van der cau snippets", "ban den cau snippets", "van den cac snippets", "van den cam snippets", "van diem cau 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: (((("van den cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van den cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van den cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van den cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.