Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra du choi snippets" » "tra do choi snippets", "tra du chi snippets", "tra su choi snippets", "tra tu choi snippets", "tran duc choi snippets", "tran duy choi 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 du choi 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 du choi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra du choi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra du choi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.