Perhaps you should try some spelling variations:
"hoang dung code slippers" » "hoang tung code slippers", "hoang vuong code slippers", "thong dung code slippers", "hoang dung cong slippers", "hoang dung co slippers", "hoang dung de slippers"
"hanh java java snippets" » "hanh va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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 java java snippets") or ("hoang dung code slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh java java snippets") OR ("hoang dung code slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh java java snippets ) or ( hoang dung code slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh java java snippets") or ("hoang dung code slippers"))) or ("locating bug code snippets"))*.