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