Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nho hieu cac snippets" » "nha hieu cac snippets", "nho sieu cac snippets", "nhu hieu cac snippets", "nho hieu luc snippets", "nho hieu va snippets", "nho hieu van 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: (((("nho hieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nho hieu cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nho hieu cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nho hieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.