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