Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tro cuu toan snippets" » "tro cuu hoan snippets", "tro cua toan snippets", "tro huu toan snippets", "tra cuu toan snippets", "troi cua toan 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: (((("tro cuu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tro cuu toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tro cuu toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tro cuu toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.