Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao lan den snippets" » "cao van den snippets", "cao dang den snippets", "cao tang den snippets", "cao luan den snippets", "cao ban den snippets", "cao dan den 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 lan den 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 lan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao lan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao lan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.