Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac thu hoi snippets" » "cach thuc hoi snippets", "cac thoi hoi snippets", "cac thu hoai snippets", "cac thu phoi snippets", "cac thu hai 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: (((("cac thu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac thu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac thu hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac thu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.