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