Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach nang du snippets" » "cach mang du snippets", "sach dung du snippets", "sach danh du snippets", "sach nang tu snippets", "sach nang luc snippets", "sach nang doc 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: (((("sach nang 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: (((("sach nang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach nang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach nang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.