Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach pha cuu snippets" » "sach phat cuu snippets", "sach phap cuu snippets", "sach nha cuu snippets", "sach pha cau snippets", "sach pha cua snippets", "sach pham huu 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: (((("sach pha 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: (((("sach pha cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach pha cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach pha cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.