Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong dau de snippets" » "cong dan de snippets", "cong cau de snippets", "cong da de snippets", "cong dau ve snippets", "cong dai de snippets", "cong sau 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: (((("cong dau 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: (((("cong dau de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dau de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dau de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.