Perhaps you should try some spelling variations:
nang ngoai » hang ngoai, nang noi, ban ngoai
doanh khoa » toan khoa
nang nga » nang nghe, hang ngay, nang noi
cuu cong » cua cong, thu cong, cac cong
su doanh » so doanh, cua doanh, san doanh
khoa hoc » hoa hoc
cong su » cong suc, cong sua, cong cu
nhan va » nhan tai, nhan dan, nhan tao
ma hoi » mai hoi, xa hoi, ma hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((nang ngoai) or (nang nga)) tap, nghien cuu cong su doanh khoa hoc ma hoi ca nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((nang ngoai) OR (nang nga)) tap, nghien cuu cong su doanh khoa hoc ma hoi ca nhan va.
• Adding a wildcard symbol may retrieve word variants: tu ((nang ngoai) or (nang nga)) tap, nghien cuu cong su doanh khoa hoc ma hoi ca nhan va*.