Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban sach con snippets" » "ban sac con snippets", "ban mach con snippets", "ngan sach con snippets", "ban cach con snippets", "ban sach song snippets", "ban sach ngon 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: (((("ban sach con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ban sach con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban sach con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban sach con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.