Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dac dieu con snippets" » "dac diem con snippets", "da dieu con snippets", "cac dieu con snippets", "dac dieu can snippets", "dac diet con snippets", "dac dieu co 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: (((("dac dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dac dieu con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dac dieu con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dac dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.