Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac dat cho snippets" » "khac dai cho snippets", "khac duan cho snippets", "nhac dan cho snippets", "khac dac cho snippets", "khac day cho snippets", "khac dan cho 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: (((("khac dat cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khac dat cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac dat cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac dat cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.