Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu phan do snippets" » "thu phan do snippets", "chau phan do snippets", "thuc phan do snippets", "khu phan bo snippets", "khu phan co snippets", "khu phan mo 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: (((("khu phan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khu phan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu phan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu phan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.