Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don chat cao snippets" » "doc chat cao snippets", "cong chat cao snippets", "dinh chat cao snippets", "don chat co snippets", "don chat cho snippets", "don chat bao 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: (((("don chat 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: (((("don chat cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don chat cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don chat cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.