Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vu khac can snippets" » "vu khac gan snippets", "vu khach san snippets", "vu khac duan snippets", "vu kham can snippets", "vu khanh can snippets", "bui khac 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: (((("vu khac 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: (((("vu khac can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vu khac can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vu khac can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.