Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach hanh tu slippers" » "sach danh tu slippers", "sach han tu slippers", "sac hanh tu slippers", "sach anh tu slippers", "sach hanh tu slippery", "sach hanh 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: (((("sach hanh 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: (((("sach hanh tu slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach hanh tu slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach hanh tu slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.