Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho moi toan snippets" » "tho mon toan snippets", "tho boi toan snippets", "tho gioi toan snippets", "cho moi toan snippets", "thi moi toan snippets", "khoe moi 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: (((("tho moi 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: (((("tho moi toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho moi toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho moi toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.