Perhaps you should try some spelling variations:
"ngu cau chat snippets" » "ngu cau code snippets", "ngu cao chat snippets", "ngu cau hat snippets", "ngu cac chat snippets", "ngu ca chat snippets", "nhu cau chat snippets", "ngu cu chat snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("ngu cau chat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("ngu cau chat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( ngu cau chat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("ngu cau chat snippets"))) or ("locating bug core snippets"))*.