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