Perhaps you should try some spelling variations:
"van truong va snippets" » "tang truong va snippets", "xuan truong va snippets", "vien truong va snippets", "van truong dai snippets", "van truong cao snippets", "van truong dao snippets", "van truong va slippers"
"using real java snippets" » "using metal java snippets", "using raw java snippets", "using real java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van truong va snippets") or ("using real java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van truong va snippets") OR ("using real java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van truong va snippets ) or ( using real java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van truong va snippets") or ("using real java snippets"))) or ("locating bug code snippets"))*.