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