Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi tre chi snippets" » "khoe tre chi snippets", "choi tre chi snippets", "khoa tre chi snippets", "khoi tri chi snippets", "khoi trien chi snippets", "khoi tren thi 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 tre chi 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 tre chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi tre chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi tre chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.