Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu moi cac snippets" » "thi moi cac snippets", "tho moi cac snippets", "thu hoi cac snippets", "thu voi cac snippets", "thu mo cac 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 moi cac 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 moi cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu moi cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu moi cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.