Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong moi de snippets" » "duong loi de snippets", "duong hoi de snippets", "duong noi de snippets", "duong moi den snippets", "duong moi ve snippets", "duong moi ke 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: (((("duong moi 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: (((("duong moi de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong moi de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong moi de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.