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