Perhaps you should try some spelling variations:
"viet trong san snippets" » "viet trung san snippets", "viet thong san snippets", "viet huong san snippets", "viet trong cac snippets", "viet cong san snippets", "viet dong san snippets", "viet trong san slippers"
"using low java snippets" » "using low 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: (((("viet trong san snippets") or ("using low java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet trong san snippets") OR ("using low java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet trong san snippets ) or ( using low java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet trong san snippets") or ("using low java snippets"))) or ("locating bug code snippets"))*.