Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach han vo snippets" » "sach tham vo snippets", "sach danh vo snippets", "sach nang vo snippets", "sach than vo snippets", "sach nhan vo snippets", "sach han va 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 han vo 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 han vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach han vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach han vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.