Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach so hoc snippets" » "cach su hoc snippets", "mach so hoc snippets", "cach noi hoc snippets", "cach co hoc snippets", "cach mo hoc snippets", "cach so hoa 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: (((("cach so hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cach so hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach so hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach so hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.