Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"danh het de snippets" » "danh viet de snippets", "danh hieu de snippets", "danh bat de snippets", "danh hat de snippets", "danh chet den snippets", "danh thiet 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: (((("danh het 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: (((("danh het de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( danh het de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("danh het de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.