Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"yen thi cua snippets" » "yen thai cua snippets", "luyen thi cua snippets", "tren thi cua snippets", "yen thi cuc snippets", "yen 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: (((("yen thi 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: (((("yen thi cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( yen thi cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("yen thi cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.