Perhaps you should try some spelling variations:
nghien chuc » nghien cuu, nghiem thuc, nghiep thuc
nganh khoa » nganh hoa, nganh khong, doanh khoa
cach thoi » cac thoi, cach thuc, cach noi
luc nganh » luc ngan, chuc nganh, luat nganh
thoi dai » hoc dai, hoi dap, hoi dan
khoa hoc » hoa hoc
nhan tai » hang tai, van tai
toan tai » toan tap, doanh tai, toan ban
su cach » su sach, tu cach, su cac
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: su cach thoi dai, nghien chuc nang luc nganh khoa hoc ma hoi va ((nhan tai) or (toan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach thoi dai, nghien chuc nang luc nganh khoa hoc ma hoi va ((nhan tai) OR (toan tai)).
• Adding a wildcard symbol may retrieve word variants: su cach thoi dai, nghien chuc nang luc nganh khoa hoc ma hoi va ((nhan tai) or (toan tai))*.