Perhaps you should try some spelling variations:
"thanh van data slippers" » "thanh san data slippers", "thanh toan data slippers", "thanh phan data slippers", "thanh van dat slippers", "thanh van dao slippers", "thanh van dau slippers", "thanh van data slippery", "thanh van 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: (((("thanh van 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: (((("thanh van data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thanh van data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thanh van data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.