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