Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan cho con snippets" » "han cho con snippets", "nhan nho con snippets", "chan cho con snippets", "nhan cho cong snippets", "nhan cho lon snippets", "nhan cho can 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: (((("nhan cho 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: (((("nhan cho con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan cho con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan cho con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.