Perhaps you should try some spelling variations:
"va truong luan snippets" » "va truong quan snippets", "va truong luat snippets", "va truong quang snippets", "van truong luan snippets", "xa truong luan snippets", "va thuong luan snippets", "va truong luan 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: (((("va truong luan snippets") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va truong luan snippets") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va truong luan snippets ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va truong luan snippets") or ("using java java snippets"))) or ("locating bug code snippets"))*.