Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong tri hoc snippets" » "dong tai hoc snippets", "dong thi hoc snippets", "dung tri hoc snippets", "dong triet hoc snippets", "dong tri thuc snippets", "dong thai hoc 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: (((("dong tri hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong tri hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tri hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tri hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.