Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi moi cong snippets" » "khi noi cong snippets", "khi voi cong snippets", "khi tai cong snippets", "thi moi cong snippets", "khi doi cong snippets", "khi hoi cong 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: (((("khi moi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi moi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi moi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi moi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.