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