Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc trinh da snippets" » "doc trinh da snippets", "hoc tinh da snippets", "hoc sinh da snippets", "hoc trinh dan snippets", "hoc trinh dao snippets", "hoc trinh do 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: (((("hoc trinh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc trinh da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc trinh da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc trinh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.