Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khac duan he snippets" » "nhac dan he snippets", "khau luan he snippets", "khai tuan he snippets", "khac quan he snippets", "khac dan he snippets", "khac chuan he 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 duan he 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 duan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khac duan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khac duan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.