Perhaps you should try some spelling variations:
"cha me toan snippets" » "cha me code snippets", "cha ke toan snippets", "cha le toan snippets", "cha mon toan snippets", "chat me toan snippets", "chua me toan snippets", "chan me 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: (((("cha me toan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cha me toan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cha me toan snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cha me toan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.