Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu canh toi snippets" » "thuc hanh toi snippets", "thu cong toi snippets", "thu ban toi snippets", "thu canh thin snippets", "thu hanh thoi snippets", "thu van toi 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: (((("thu canh toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu canh toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu canh toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu canh toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.