Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"xuan toan do snippets" » "xuan toan code snippets", "xuan toan ho snippets", "xuan toan co snippets", "xuan toan du snippets", "quan toan do snippets", "luan toan do snippets", "xuat toan do 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: (((("xuan toan do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan toan do snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( xuan toan do snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan toan do snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.