Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa tao cau snippets" » "khoa tai cau snippets", "khoa tap cau snippets", "khoa than cau snippets", "khoa tao cu snippets", "khoa tao cao snippets", "khoa tao sau 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 tao cau 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 tao cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa tao cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa tao cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.