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