Perhaps you should try some spelling variations:
"lua hoi dong snippets" » "lua hoi code snippets", "lua hop dong snippets", "lua hoat dong snippets", "lua ha dong snippets", "luat hoi dong snippets", "cua hoi dong snippets", "lua doi dong 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 hoi dong 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 hoi dong snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("lua hoi dong snippets"))) or ("locating bug core snippets"))*.