Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
thuoc tai » nuoc tai, hoc tai, thuoc ma
danh nhan » doanh nhan, thanh nhan, benh nhan
cac thoi » cac toi, cac hop, cac tro
thoi gap » toi gap, thoi gian, thoi dai
hoi danh » hop danh, hoi dan, hoc danh
cuu hoa » cuu khoa, cuu hoan, cau hoa
thuc va » thuc vat, thuc dan, thuc day
nhan va » nhan tai, nhan dan, nhan tao

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 gap, nghien cuu hoa hoc nganh khong ((thuc va) or (thuoc tai)) hoi danh nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thoi gap, nghien cuu hoa hoc nganh khong ((thuc va) OR (thuoc tai)) hoi danh nhan va.
• Adding a wildcard symbol may retrieve word variants: tu cac thoi gap, nghien cuu hoa hoc nganh khong ((thuc va) or (thuoc tai)) hoi danh nhan va*.