Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach bao cau snippets" » "sach dao cau snippets", "sach bai cau snippets", "sach bac cau snippets", "sach bao cao snippets", "sach bo cau snippets", "sach tao 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: (((("sach bao cau 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 bao cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach bao cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach bao cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.