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