Perhaps you should try some spelling variations:
"xuan trinh o snippets" » "qua trinh o snippets", "xuan dinh o snippets", "xuan kinh o snippets", "xuan trinh do snippets", "xuan trinh co snippets", "xuan trinh mo snippets"
"python using java snippets" » "python using data snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 trinh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan trinh o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan trinh o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan trinh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.