Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mong luan de snippets" » "tong luan de snippets", "cong luan de snippets", "dong luan de snippets", "mong luan den snippets", "mong luan ve snippets", "mong luat de 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: (((("mong luan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mong luan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mong luan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mong luan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.