Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua ngo doan snippets" » "cua ngoc toan snippets", "cua ngo van snippets", "cua ngo xuan snippets", "cua ngu doan snippets", "cua nguoi doan snippets", "cua ngan doan 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: (((("cua ngo doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua ngo doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua ngo doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua ngo doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.