Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"using java java snippets" » "using data java snippets"
"van toan va snippets" » "van tuan va snippets", "van tan va snippets", "van thanh va snippets", "van doan va snippets", "van tran van snippets", "van toan ban 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 toan va snippets") or ("using java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van toan va snippets") OR ("using java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( van toan va snippets ) or ( using java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van toan va snippets") or ("using java java snippets"))) or ("locating bug core snippets"))*.