Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc cong cua snippets" » "hoc cong cua snippets", "duc cong cua snippets", "do cong cua snippets", "doc cong cu snippets", "doc dong cua snippets", "doc huong cua 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: (((("doc cong 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: (((("doc cong cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc cong cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc cong cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.