Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhu hieu cac snippets" » "nhu hien cac snippets", "nha hieu cac snippets", "nho hieu cac snippets", "nhu hieu luc snippets", "nhu hieu va snippets", "nhu 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: (((("nhu 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: (((("nhu hieu cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhu hieu cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhu hieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.