Perhaps you should try some spelling variations:
"han tong cong snippets" » "han tong code snippets", "han trong cong snippets", "han cong cong snippets", "han dung cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"using data java snippets" » "using java java snippets", "using sat java snippets", "missing data java 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 data java snippets") or ("han tong cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using data java snippets") OR ("han tong cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using data java snippets ) or ( han tong cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using data java snippets") or ("han tong cong snippets"))) or ("locating bug core snippets"))*.