Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"truc dan so snippets" » "thuc dan so snippets", "tuc dan so snippets", "truc ban so snippets", "truc dan soc snippets", "truc dan su snippets", "truc dan mo 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: (((("truc dan 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: (((("truc dan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truc dan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truc dan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.