Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi lap toan snippets" » "thi tap toan snippets", "thi lap doanh snippets", "thi phap toan snippets", "thi lan toan snippets", "tai lap toan snippets", "thi cap toan 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: (((("thi lap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi lap toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi lap toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi lap toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.