Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong goi con snippets" » "dong hoi con snippets", "dung goi con snippets", "cong goi con snippets", "dong moi con snippets", "dong voi con snippets", "dong noi cong 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: (((("dong goi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong goi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong goi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong goi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.