Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc luan do snippets" » "hoc quan do snippets", "nuoc luan do snippets", "hoc luong do snippets", "hoc luan doi snippets", "hoc luan de snippets", "hoc tuan do 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: (((("hoc luan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc luan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc luan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc luan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.