Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi nhat he snippets" » "khoi thuat he snippets", "khong nhat he snippets", "hoi nhap he snippets", "khoi nhat ve snippets", "khoi nhat le snippets", "khoi nhat 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: (((("khoi nhat 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: (((("khoi nhat he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi nhat he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi nhat he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.