Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khien cua da snippets" » "khien qua da snippets", "khien tu da snippets", "trien cua da snippets", "khien cua dan snippets", "khien cua dai snippets", "khien cua dam 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: (((("khien cua 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: (((("khien cua da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khien cua da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khien cua da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.