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