Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
va phan » van phan, va phat, hoa phan
va phap » va phat, ban phap

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 hoi tap, nghien thu cong hoc nganh khong hoc mai hoi ((va phan) OR (va phap)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoi tap, nghien thu cong hoc nganh khong hoc mai hoi ((va phan) OR (va phap)) van".
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, nghien thu cong hoc nganh khong hoc mai hoi ((va phan) OR (va phap)) van*.