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