Perhaps you should try some spelling variations:
"using real code snippets" » "using metal code snippets", "using raw code snippets", "using real core snippets", "using real code slippers"
"van thinh java snippets" » "van trinh java snippets", "van think java snippets", "van thanh java snippets", "van chinh java snippets", "van minh java snippets", "van thinh java slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "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 real code snippets") or ("van thinh java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using real code snippets") OR ("van thinh java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using real code snippets ) or ( van thinh java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using real code snippets") or ("van thinh java snippets"))) or ("locating bug code snippets"))*.