Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao luan du snippets" » "khau luan du snippets", "khai luan du snippets", "khanh luan du snippets", "khao xuan du snippets", "khao luat du snippets", "khao luan de 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: (((("khao luan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khao luan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao luan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao luan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.