Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra khao con snippets" » "tra kha con snippets", "tham khao con snippets", "va khao con snippets", "tra khao co snippets", "tra khau cong snippets", "tra khao cuu 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 khao con 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 khao con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra khao con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra khao con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.