Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach han do snippets" » "sach tham do snippets", "sach danh do snippets", "sach nang do snippets", "sach phan do snippets", "sach ban do snippets", "sach van do 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 han do 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 han do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach han do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach han do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.