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