Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri nhan cho snippets" » "tue nhan cho snippets", "tri han cho snippets", "tri nhan nho snippets", "tri chan cho 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: (((("tri nhan cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri nhan cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri nhan cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri nhan cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.