Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan kinh co snippets" » "than kinh co snippets", "toan kinh co snippets", "tang kinh co snippets", "tan kinh do snippets", "tan tinh co snippets", "tan trinh co 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 kinh co 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 kinh co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan kinh co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan kinh co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.