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