Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach che ton snippets" » "sach thue ton snippets", "sach nha ton snippets", "sach cap ton snippets", "sach che mon snippets", "sach che cong snippets", "sach che tinh 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 che ton 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 che ton snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach che ton snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach che ton snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.