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