Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
hoc nganh » hoc nhanh
kon hinh » doan hinh, khoa hinh, hong hinh
hinh hoc » sinh hoc, tin hoc, benh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
thuoc ma » hoc ma, duoc ma
hoi cau » hoi chu, hoc cau, hoi cac
hoa cau » hoa cac, hoa dau, hoa mau
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: kon hinh hoc tap, nghien cuu cong hoc nganh khong thuoc ma ((hoi cau) OR (hoa cau)) nhan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "kon hinh hoc tap, nghien cuu cong hoc nganh khong thuoc ma ((hoi cau) OR (hoa cau)) nhan va".
• Adding a wildcard symbol may retrieve word variants: kon hinh hoc tap, nghien cuu cong hoc nganh khong thuoc ma ((hoi cau) OR (hoa cau)) nhan va*.