Perhaps you should try some spelling variations:
"canh duong o snippets" » "anh duong o snippets", "thanh duong o snippets", "anh huong o snippets", "canh duong co snippets", "canh duong _ snippets", "canh duong loi snippets"
"python using java snippets" » "python using data 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: (((("canh duong o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("canh duong o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( canh duong o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("canh duong o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.