Perhaps you should try some spelling variations:
"duong cau thep snippets" » "duong cac thep snippets", "duong cao thep snippets", "dung cau thep snippets", "duong cau theo snippets", "duong cau thi snippets", "duong cot thep snippets"
"dung java java slippers" » "dung va java slippers", "dung java java slippery", "dung java java 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: (((("duong cau thep snippets") or ("dung java java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong cau thep snippets") OR ("dung java java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong cau thep snippets ) or ( dung java java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong cau thep snippets") or ("dung java java slippers"))) or ("locating bug code snippets"))*.