Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa te cau snippets" » "khoa tre cau snippets", "khoa he cau snippets", "khoa de cau snippets", "khoa ke cau snippets", "khoa le cau snippets", "khoa te cao 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 te 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 te cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa te cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa te cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.