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