Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong dau o snippets" » "cong dan o snippets", "cong cau o snippets", "cong da o snippets", "cong dau co snippets", "cong dau mo snippets", "cong dau do 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: (((("cong dau o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dau o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dau o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dau o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.