Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ken tap toan snippets" » "ken tap doan snippets", "ken tap quan snippets", "ken bai toan snippets", "bien tap toan snippets", "kien tao toan 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: (((("ken tap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ken tap toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ken tap toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ken tap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.