Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa dan cuu snippets" » "khoa dang cuu snippets", "hoa dan cuu snippets", "khoa can cuu snippets", "khoa dan cu snippets", "khoa dan cua snippets", "khoa dan luu 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: (((("khoa dan cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa dan cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa dan cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa dan cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.