Perhaps you should try some spelling variations:
"using java code slippers" » "using data code slippers"
"dan nhan trong snippets" » "dan nhuan trong snippets", "dan nhat trong snippets", "dan nhin trong snippets", "danh nhan trong snippets", "dan chan trong snippets", "van nhan trong 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: (((("using java code slippers") or ("dan nhan trong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code slippers") OR ("dan nhan trong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code slippers ) or ( dan nhan trong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code slippers") or ("dan nhan trong snippets"))) or ("locating bug code snippets"))*.