Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toeic noi co snippets" » "toeic noi cho snippets", "toeic noi bo snippets", "toeic moi co snippets", "topic noi co snippets", "toxic noi co 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: (((("toeic noi co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toeic noi co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toeic noi co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toeic noi co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.