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