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