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