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