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