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