Perhaps you should try some spelling variations:
"hanh cong dat slippers" » "thanh cong dat slippers", "hang cong dat slippers", "hanh dong dat slippers", "hanh cong dan slippers", "hanh cong da slippers", "hanh cong dat slippery", "hanh cong dat 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: (((("hanh cong dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh cong dat slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh cong dat slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh cong dat slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.