Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong nhan cu snippets" » "cong nhat cu snippets", "cong thanh cu snippets", "cong san cu snippets", "cong nhan cua snippets", "cong nhan su snippets", "cong nhac cu 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 nhan cu 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 nhan cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong nhan cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong nhan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.