Perhaps you should try some spelling variations:
"doc trinh java snippets" » "doc tinh java snippets", "doi trinh java snippets", "hoc trinh java snippets"
"cong hung code slippers" » "cong chung code slippers", "cong huong code slippers", "cong dung code slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("doc trinh java snippets") or ("cong hung code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc trinh java snippets") OR ("cong hung code slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc trinh java snippets ) or ( cong hung code slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc trinh java snippets") or ("cong hung code slippers"))) or ("locating bug code snippets"))*.