Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan ly doi snippets" » "quan ly doi snippets", "xuan ky doi snippets", "xuan huy doi snippets", "xuan ly dai snippets", "xuan ly do 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 ly doi 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 ly doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan ly doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan ly doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.