Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vit toan chi snippets" » "vi toan chi snippets", "nin toan chi snippets", "van toan chi snippets", "vit toan cao snippets", "vit tai chi snippets", "vit luan chi 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: (((("vit toan 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: (((("vit toan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vit toan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vit toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.