Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc luan doi snippets" » "hoc quan doi snippets", "nuoc luan doi snippets", "hoc luong doi snippets", "hoc lua doi snippets", "hoc luan gioi 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 doi 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 doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc luan doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc luan doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.