Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho viet cau snippets" » "co viet cau snippets", "tho viet cau snippets", "ho viet cau snippets", "cho viet chau snippets", "cho viet ca snippets", "cho viet chu 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: (((("cho viet 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: (((("cho viet cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho viet cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho viet cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.