Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don minh voi snippets" » "doan minh voi snippets", "do minh voi snippets", "don tinh voi snippets", "don binh voi snippets", "don minh hoi snippets", "don minh loi 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 minh voi 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 minh voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don minh voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don minh voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.