Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan duoc con snippets" » "tao duoc con snippets", "tran duc con snippets", "da duoc con snippets", "tan duoc co snippets", "tan duc con snippets", "tan nuoc cong 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 duoc con 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 duoc con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan duoc con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan duoc con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.