Perhaps you should try some spelling variations:
"trinh tin data slippers" » "trinh kinh data slippers", "trinh toan data slippers", "trinh tu data slippers", "trinh big data slippers", "trinh tin bat slippers", "trinh aid data slippers", "trinh tin data slippery", "trinh tin data 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: (((("trinh tin data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh tin data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh tin data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh tin data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.