Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao xuan den snippets" » "dao xuan den snippets", "cao quan den snippets", "ngo xuan den snippets", "cao xuan dien snippets", "cao xuan yen 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 xuan 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 xuan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao xuan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao xuan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.