Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
dich hoc » sinh hoc, hinh hoc, tinh hoc
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
nhan dan » phan dau, nhan tai
gian dan » gian lang
tu dich » te dich, chu dich, hut dich
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu dich hoc tap, nghien thu cong hoc nganh khoa hoc ma hoa va ((nhan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dich hoc tap, nghien thu cong hoc nganh khoa hoc ma hoa va ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: tu dich hoc tap, nghien thu cong hoc nganh khoa hoc ma hoa va ((nhan dan) or (gian dan))*.