Perhaps you should try some spelling variations:
thong khoa » tuong khoa, hong khoa, phong khoa
khoa nganh » khoi nganh, hoc nganh
cuu thong » cuu thuong, cuu tong, cuu chong
nganh hoa » thanh hoa, khanh hoa, danh hoa
danh nhan » doanh nhan, thanh nhan, benh nhan
sach doi » sach hoi, sach moi, sach dao
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
doi tap » doi tac, doi dap, doi tai
cua hai » qua hai, cua dai, cua hoi
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: tu sach doi tap, nghien cuu thong khoa nganh hoa hoc ((xa hai) or (cua hai)) danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach doi tap, nghien cuu thong khoa nganh hoa hoc ((xa hai) OR (cua hai)) danh nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach doi tap, nghien cuu thong khoa nganh hoa hoc ((xa hai) or (cua hai)) danh nhan dan*.