Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao cong won snippets" » "cac cong won snippets", "cao dang won snippets", "cua cong won snippets", "cao cong lon snippets", "cao cong hon snippets", "cao cong xon 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 won 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 won snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao cong won snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao cong won snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.