Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan vu cao snippets" » "tran vu cao snippets", "van vu cao snippets", "tan su cao snippets", "tan cu cao snippets", "tan va cao 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: (((("tan vu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan vu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan vu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan vu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.