Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan minh son snippets" » "tran minh son snippets", "tuan minh son snippets", "van minh son snippets", "tan tinh son snippets", "tan minh toan snippets", "tan dinh 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: (((("tan minh son 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 minh son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan minh son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan minh son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.