Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao cong que snippets" » "cac cong que snippets", "cao dang que snippets", "cua cong que snippets", "cao cong quy snippets", "cao thong que snippets", "cao huong que 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: (((("cao cong que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao cong que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao cong que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao cong que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.