Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don thi choi snippets" » "don tro choi snippets", "don thi hai snippets", "don thi hoa snippets", "doan thi choi snippets", "dong thi choi snippets", "do thi choi 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 thi choi 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 thi choi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don thi choi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don thi choi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.