Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
hoc giai » hoc giao, hoc dai, so giai
van pham » san pham, van phan, van phat
hoc bai » hoc dai
hoi van » hoi va, hoi dan, hai van
tim » time

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

• Performing a fuzzy search may retrieve terms with similar spellings: tim mach hoc tap, nghien cuu dong hoc nganh khoa ((hoc bai) or (hoc giai)) hoi van pham van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tim mach hoc tap, nghien cuu dong hoc nganh khoa ((hoc bai) OR (hoc giai)) hoi van pham van.
• Adding a wildcard symbol may retrieve word variants: tim mach hoc tap, nghien cuu dong hoc nganh khoa ((hoc bai) or (hoc giai)) hoi van pham van*.