Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lap trinh su slippers" » "lap trinh tu slippers", "lap trinh san slippers", "lap trinh cau slippers", "lap trinh su slippery", "lap trinh su grippers"
"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: (((("lap trinh su slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lap trinh su slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lap trinh su slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lap trinh su slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.