Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bich toan ve snippets" » "tich toan ve snippets", "bich loan ve snippets", "bich tran ve snippets", "bich toan va snippets", "bich toan ke snippets", "bich 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: (((("bich 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: (((("bich toan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bich toan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bich toan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.