Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cad phieu o snippets" » "cao hieu o snippets", "co phieu o snippets", "cac chieu o snippets", "cad thieu o snippets", "cad thieu so 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: (((("cad phieu o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cad phieu o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cad phieu o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cad phieu o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.