Perhaps you should try some spelling variations:
"le toan doan snippets" » "le toan code snippets", "le toan doanh snippets", "le tan doan snippets", "le tran doan snippets", "ke toan doan snippets", "le doan doan snippets", "le tuan doan 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 ("le toan doan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("le toan doan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( le toan doan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("le toan doan snippets"))) or ("locating bug core snippets"))*.