Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc mau cong snippets" » "duc cau cong snippets", "duc may cong snippets", "duc mai cong snippets", "duc hau cong snippets", "duc manh cong 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 mau cong 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 mau cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc mau cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc mau cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.