Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"dong lieu nhap snippets" » "dong hieu nhap snippets", "dong dieu nhap snippets", "dong tieu nhap snippets", "dong lieu phap snippets", "dong lieu nha snippets", "dong lieu tham snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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 ("dong lieu nhap snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("dong lieu nhap snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( dong lieu nhap snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("dong lieu nhap snippets"))) or ("locating bug code slippers"))*.