Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lich han cao snippets" » "dich han cao snippets", "lich can cao snippets", "lich thai cao snippets", "lich han cho snippets", "lich han gao snippets", "lich hoang cao 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: (((("lich han cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lich han cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lich han cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lich han cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.