Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra tinh son snippets" » "tra trinh son snippets", "trao tinh son snippets", "tra linh son snippets", "tra tinh toan snippets", "tra dinh so snippets", "tra tinh hoc 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 tinh son 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 tinh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra tinh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra tinh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.