Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lua duy ke snippets" » "la duy ke snippets", "luan quy ke snippets", "luan day ke snippets", "lua duy de snippets", "lua duy khoe snippets", "lua duy kien 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: (((("lua duy ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lua duy ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lua duy ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lua duy ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.