Perhaps you should try some spelling variations:
"lua cac nghe snippets" » "lua cac code snippets", "lua cap nghe snippets", "lua cac nghi snippets", "lua can nghe snippets", "luat cac nghe snippets", "cua cac nghe snippets", "qua cac nghe 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 cac nghe 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 cac nghe snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( lua cac nghe snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("lua cac nghe snippets"))) or ("locating bug core snippets"))*.