Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan cac xe snippets" » "luan dac xe snippets", "luan tac xe snippets", "luat cac xe snippets", "luan cac he snippets", "luan cac ke snippets", "luan cac le 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: (((("luan cac xe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luan cac xe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan cac xe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan cac xe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.