Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap nan cua snippets" » "phap nang cua snippets", "phap han cua snippets", "phap van cua snippets", "phap nhan cua snippets", "phap ban cua snippets", "phap nam 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: (((("phap nan 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: (((("phap nan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap nan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap nan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.