Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don tra cuu snippets" » "dan tra cuu snippets", "dong tri cuu snippets", "con trai cuu snippets", "don tra cau snippets", "don trau cua snippets", "don trua cua 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: (((("don tra cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don tra cuu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don tra cuu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don tra cuu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.