Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, don thuoc
hoc nganh » hoc nhanh
thong hoa » thong khoa, thong ha, thong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
van nhan » van phan, van thanh, danh nhan
nhan van » nhan dan, nhan va, phan van
vu sach » vu bach, su sach, vu khach
hai van » thai van, ha van, hai tan
xa hai » xa thai, xua hai, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach hoc tap, nghien cuu cong hoc nganh ((dong thuoc) or (thong hoa)) xa hai van nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach hoc tap, nghien cuu cong hoc nganh ((dong thuoc) OR (thong hoa)) xa hai van nhan van.
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu cong hoc nganh ((dong thuoc) or (thong hoa)) xa hai van nhan van*.