Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"que sach cap snippets" » "quyen sach cap snippets", "quan sach cap snippets", "quoc sach cap snippets", "que sach dao snippets", "que sach bai snippets", "que sach xa 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: (((("que sach cap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("que sach cap snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( que sach cap snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("que sach cap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.