Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong danh da snippets" » "cuong danh da snippets", "cong dan da snippets", "cong thanh da snippets", "cong danh dau snippets", "cong danh ca 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: (((("cong danh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong danh da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong danh da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong danh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.