Perhaps you should try some spelling variations:
"lua cuu hoan snippets" » "lua cuu code snippets", "lua luu hoang snippets", "lua cuu van snippets", "lua cuu khoa snippets", "lua cua hoan snippets", "cua cuu hoan snippets", "lua cau hoan 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 cuu hoan 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 cuu hoan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( lua cuu hoan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("lua cuu hoan snippets"))) or ("locating bug core snippets"))*.