Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"qua danh do snippets" » "qua dan do snippets", "luan danh do snippets", "luat danh do snippets", "qua dang do snippets", "qua danh co snippets", "qua danh di 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: (((("qua danh 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: (((("qua danh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( qua danh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("qua danh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.