Perhaps you should try some spelling variations:
nghien hieu » nghiep hieu, nghe hieu, thien hieu
doanh khoa » toan khoa
thanh phan » thanh pho, thanh san, thanh toan
goc doanh » hoa doanh, voi doanh, von doanh
sach hoc » cach hoc, sach hoi, mach hoc
hieu mot » thieu mot, hieu moi, hieu so
khoa hoc » hoa hoc
phan van » pham van, thanh van, luan van
tu sach » thu sach, su sach, te sach
hoc tai » hoc dai, hoc tap, hoc bai
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 sach hoc tai, nghien hieu mot goc doanh khoa hoc ma hoi va ((phan van) or (thanh phan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tai, nghien hieu mot goc doanh khoa hoc ma hoi va ((phan van) OR (thanh phan)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tai, nghien hieu mot goc doanh khoa hoc ma hoi va ((phan van) or (thanh phan))*.