Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thong van so snippets" » "trong van so snippets", "thong va so snippets", "thong quan so snippets", "thong van son snippets", "thong van soa snippets", "thong van su 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: (((("thong van 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: (((("thong van so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong van so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong van so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.