Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cong phap » chong phap, cong phan, cong pham
phap toan » phap hoan, phap luan, phap phan
sach hoc » cach hoc, sach hoi, mach hoc
toan hoa » toan khoa, toan hoat, toan hoc
nhan van » nhan dan, nhan va, nha van
phan van » pham van, thanh van, luan van
su sach » so sach, vu sach
hoc xa » hoc ma

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

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