Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan tai son snippets" » "hang tai son snippets", "van tai son snippets", "toan tai son snippets", "nhan thai son snippets", "nhan tai san snippets", "nhan tai 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: (((("nhan tai 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: (((("nhan tai son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan tai son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan tai son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.