Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cot thai cua snippets" » "co thai cua snippets", "chat thai cua snippets", "cong thai cua snippets", "cot than cua snippets", "cot tai cuc snippets", "cot tri 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: (((("cot thai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cot thai cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cot thai cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cot thai cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.