Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"anh chuan do snippets" » "anh chuyen do snippets", "anh tuan do snippets", "anh nhan do snippets", "anh chuan dao snippets", "anh chuan co snippets", "anh chuan doan 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: (((("anh chuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("anh chuan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( anh chuan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("anh chuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.