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