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