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