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