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