Perhaps you should try some spelling variations:
"tra cho cham snippets" » "tra cho code snippets", "tra co cham snippets", "tra chao chao snippets", "tra chin cham snippets", "trang cho cham snippets", "tra chat cham snippets", "toan cho cham 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 cho cham 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 cho cham snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( tra cho cham snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("tra cho cham snippets"))) or ("locating bug core snippets"))*.