Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach mau cua snippets" » "sach dau cua snippets", "sach dao cua snippets", "bach mai cua snippets", "sach ma cua snippets", "sach mat cua snippets", "sach cau cua 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 mau cua 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 mau cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach mau cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach mau cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.