Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi tuyen de snippets" » "thi huyen de snippets", "thi xuyen de snippets", "thi tuyet de snippets", "thi luyen de snippets", "thi tuyen diem snippets", "thi tuyen dien 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 tuyen de 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 tuyen de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi tuyen de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi tuyen de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.