Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do tuan chi snippets" » "do luan chi snippets", "do toan chi snippets", "do quan chi snippets", "do xuan chi snippets", "do quang chi 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: (((("do tuan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do tuan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do tuan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do tuan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.