Perhaps you should try some spelling variations:
nghien hieu » nghiep hieu, nghe hieu, thien hieu
nganh nong » nganh cong
nong thuoc » dong thuoc, long thuoc, khong thuoc
goc nganh » hoc nganh, hoc nhanh, cac nganh
hieu mot » thieu mot, hieu moi, hieu so
thuoc ma » hoc ma, duoc ma
van phan » van phong, van thanh, luan phan
anh hoc » sinh hoc, benh hoc, hinh hoc
hoc bai » hoc dai, hoc giai
va phan » va phat, va phap, hoa phan
tu anh » tu hanh, tu manh, thu anh
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu anh hoc bai, nghien hieu mot goc nganh nong thuoc ma hoi ((va phan) OR (van phan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu anh hoc bai, nghien hieu mot goc nganh nong thuoc ma hoi ((va phan) OR (van phan)) van".
• Adding a wildcard symbol may retrieve word variants: tu anh hoc bai, nghien hieu mot goc nganh nong thuoc ma hoi ((va phan) OR (van phan)) van*.