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