Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
cach nhanh » cac nganh, cac nhan, cac thanh
coc nhanh » hoc nhanh, doc nhanh, cuoc thanh
cac thoi » cac toi, cac hop, cac tro
thoi dai » hoc dai, hoi dap, hoi dan
van tai » von tai, van tuan
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac thoi dai, nghien cua cong ((coc nhanh) OR (cach nhanh)) hoa hoc ma hoi va van tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac thoi dai, nghien cua cong ((coc nhanh) OR (cach nhanh)) hoa hoc ma hoi va van tai".
• Adding a wildcard symbol may retrieve word variants: tu cac thoi dai, nghien cua cong ((coc nhanh) OR (cach nhanh)) hoa hoc ma hoi va van tai*.