Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lua sach che snippets" » "loai sach che snippets", "luan hach che snippets", "luan mach che snippets", "lua sach thue snippets", "lua sach nha snippets", "lua sach cap 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: (((("lua sach che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lua sach che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lua sach che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lua sach che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.