Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan van chi snippets" » "nhan dan chi snippets", "nhan va chi snippets", "phan van chi snippets", "nhan van chien snippets", "nhan luan chi snippets", "nhan van chat 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 van 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: (((("nhan van chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan van chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan van chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.