Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tich toan ve snippets" » "tinh toan ve snippets", "tich than ve snippets", "trinh toan ve snippets", "tich toan va snippets", "tich toan ke snippets", "tich toan von 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: (((("tich toan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tich toan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tich toan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tich toan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.