Perhaps you should try some spelling variations:
"van trinh khoi snippets" » "van trinh hoi snippets", "van trinh khoa snippets", "van trinh khai snippets", "van thinh khoi snippets", "van tinh khoi snippets", "dan trinh khoi snippets", "van trinh khoi slippers"
"using java java snippets" » "using data java snippets", "using java 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 trinh khoi snippets") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van trinh khoi snippets") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van trinh khoi snippets ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van trinh khoi snippets") or ("using java java snippets"))) or ("locating bug code snippets"))*.