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