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