Perhaps you should try some spelling variations:
nghien cau » nghien cuu, nghiep cau, nghiep cay
nhanh khoa » nhan khoa, nganh khoa, hang khoa
hoc nhanh » hoc nganh, hoc phan
ban thanh » ban hanh, ban hang
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
van phan » van phong, van thanh, luan phan
su sach » so sach, vu sach
hoi hoc » hoa hoc, hoi chuc
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: su sach hoc tap, nghien cau hoi hoc nhanh khoa hoc xa hoi ((van phan) or (ban thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien cau hoi hoc nhanh khoa hoc xa hoi ((van phan) OR (ban thanh)) van.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cau hoi hoc nhanh khoa hoc xa hoi ((van phan) or (ban thanh)) van*.