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