Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
hoc nganh » hoc nhanh
cac thoi » cac toi, cac hop, cac tro
thoi gap » toi gap, thoi gian, thoi dai
khoa hoc » hoa hoc
thuoc xa » thuoc ma, thuoc va, thuoc tai
thuoc la » thuoc ma, thuoc va, thuoc tai
van phan » van phong, van thanh, luan phan
hoi van » hoi va, hoi dan, hai van
phan va » phan van, nhan va, han va

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 khoa hoc nganh cong ((thuoc xa) or (thuoc la)) hoi van phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac thoi gap, nghien cuu khoa hoc nganh cong ((thuoc xa) OR (thuoc la)) hoi van phan va.
• Adding a wildcard symbol may retrieve word variants: tu cac thoi gap, nghien cuu khoa hoc nganh cong ((thuoc xa) or (thuoc la)) hoi van phan va*.