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