Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao thi cho snippets" » "cau thi cho snippets", "cao tai cho snippets", "dao thi cho snippets", "cao thi choi snippets", "cao thi tho snippets", "cao thi thao 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 thi cho 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 thi cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao thi cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao thi cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.