Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thpt cho cay snippets" » "thpt chu cay snippets", "thpt nho cay snippets", "thpt khoa cay snippets", "thpt cho cac snippets", "thpt cho vay snippets", "thpt cho can 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: (((("thpt cho cay snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thpt cho cay snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thpt cho cay snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thpt cho cay snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.