Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mot khoi can snippets" » "mot thoi can snippets", "hoc khoi can snippets", "co khoi can snippets", "mot khoa can snippets", "mot khoi nang snippets", "mot hoc can 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: (((("mot khoi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("mot khoi can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mot khoi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mot khoi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.