Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, nganh khong, doanh khoa
suc nganh » luc nganh, chuc nganh, suc manh
cac cong » cua cong
cong suc » cong thuc, cong suat, cong chuc
khoa hoc » hoa hoc
van nhan » van phan, van thanh, danh nhan
tu manh » tu minh, tu hanh, vu manh
manh ho » manh hon, minh hoa, danh hoa
va nhan » ca nhan, va phan, va nha
ho tap » hoc tap, ho hap, ho tai
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu manh ho tap, nghien cac cong suc nganh khoa hoc xa hoi ((va nhan) or (van nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu manh ho tap, nghien cac cong suc nganh khoa hoc xa hoi ((va nhan) OR (van nhan)) van.
• Adding a wildcard symbol may retrieve word variants: tu manh ho tap, nghien cac cong suc nganh khoa hoc xa hoi ((va nhan) or (van nhan)) van*.