Perhaps you should try some spelling variations:
"viet truong va snippets" » "viet trung va snippets", "vien truong va snippets", "viet trong va snippets", "viet truong dai snippets", "viet truong cao snippets", "viet truong dao snippets", "viet truong va slippers"
"using _ java snippets" » "using _ 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: (((("using _ java snippets") or ("viet truong va snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using _ java snippets") OR ("viet truong va snippets"))) OR ("locating bug code snippets"))*.
• Removing quotes may allow a broader search: (((( using _ java snippets ) or ( viet truong va snippets ))) or ( locating bug code snippets ))*.