Perhaps you should try some spelling variations:
dich hoc » sinh hoc, hinh hoc, tinh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong boc » dong hoc, dong bac, dong bo
boc ngan » bo ngan, hoc nganh, buoi ngan
gian dan » gian lang
tu dich » te dich, chu dich, hut dich
va gian » va gianh, van gian, va giai

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 cuu dong boc ngan hang ((hoc xa) or (hoc ma)) hoi va gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dich hoc tap, nghien cuu dong boc ngan hang ((hoc xa) OR (hoc ma)) hoi va gian dan.
• Adding a wildcard symbol may retrieve word variants: tu dich hoc tap, nghien cuu dong boc ngan hang ((hoc xa) or (hoc ma)) hoi va gian dan*.