Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong su cau snippets" » "cong suc cau snippets", "cong sua cau snippets", "cong cu cau snippets", "cong su cao snippets", "cong su can 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 su cau 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 su cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong su cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong su cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.