Perhaps you should try some spelling variations:
"lua duc cong snippets" » "lua duc code snippets", "lua duc cuong snippets", "lua dung cong snippets", "lua nuoc cong snippets", "cua duc cong snippets", "luu duc cong snippets", "luat duoc cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("lua duc cong snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("lua duc cong snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( lua duc cong snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("lua duc cong snippets"))) or ("locating bug core snippets"))*.