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