Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cuon sach du snippets" » "duong sach du snippets", "cuoc cach du snippets", "co sach du snippets", "cuon sach dau snippets", "cuon sach de snippets", "cuon sach tu 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: (((("cuon sach du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuon sach du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuon sach du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuon sach du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.