Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi tho cau snippets" » "hoi tho cau snippets", "khoi khoa cau snippets", "khoi thuy cau snippets", "khoi tho ca snippets", "khoi tho cac snippets", "khoi tao 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: (((("khoi tho 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: (((("khoi tho cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi tho cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi tho cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.