Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mo khoa cham snippets" » "mo khoa kham snippets", "mo khoa cam snippets", "mo khoa chau snippets", "moc khoa cham snippets", "meo khoa cham snippets", "mon khoa cham 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: (((("mo khoa cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mo khoa cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mo khoa cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mo khoa cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.