Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu kinh con snippets" » "thu minh con snippets", "thuat kinh con snippets", "nha kinh con snippets", "thu kinh co snippets", "thu kinh mon snippets", "thu kinh 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: (((("thu kinh con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thu kinh con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu kinh con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu kinh con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.