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