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