Perhaps you should try some spelling variations:
"duong cham data slippers" » "duong cam data slippers", "duong ham data slippers", "phuong cham data slippers", "duong chap dat slippers", "duong cham mat slippers", "duong pham dat slippers", "duong cham data slippery", "duong cham 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: (((("duong cham 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: (((("duong cham data slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong cham data slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong cham data slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.