Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac giam cua snippets" » "tac gia cua snippets", "tac giai cua snippets", "tac pham cua snippets", "tac gian cua snippets", "tac giau cua 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: (((("tac giam cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac giam cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac giam cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac giam cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.