Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan canh cua snippets" » "lan anh cua snippets", "van canh cua snippets", "lan oanh cua snippets", "lan manh cua snippets", "lan hanh 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: (((("lan canh 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: (((("lan canh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan canh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan canh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.