Perhaps you should try some spelling variations:
"lua duc nghe snippets" » "lua duc code snippets", "lua duc nghia snippets", "lua duc ngoc snippets", "lua day nghe snippets", "cua duc nghe snippets", "luu duc nghe snippets", "luat duoc nghe snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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 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 duc nghe snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( lua duc nghe snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("lua duc nghe snippets"))) or ("locating bug core snippets"))*.