Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luan bi cong snippets" » "luan vi cong snippets", "luan chi cong snippets", "luan rui cong snippets", "luan bo cong snippets", "luan tai cong snippets", "luan thi cong 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 bi cong 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 bi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luan bi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan bi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.