Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"cong danh lua slippers" » "cuong danh lua slippers", "cong dan lua slippers", "cong thanh lua slippers", "cong danh qua slippers", "cong dinh lua slippers", "cong doanh luan slippers", "cong danh lua slippery", "cong danh lua grippers"
"locating bug code snippets" » "locating bug core 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: (((("using java code snippets") or ("cong danh lua slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("cong danh lua slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( cong danh lua slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("cong danh lua slippers"))) or ("locating bug code snippets"))*.