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