Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do vien canh snippets" » "do bien canh snippets", "do vien can snippets", "do vien nganh snippets", "do viet canh snippets", "do dien canh snippets", "do tien canh 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: (((("do vien canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do vien canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do vien canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do vien canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.