Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh khoa » toan khoa
hoc doanh » hoa doanh, hoc danh, hoc dan
sach hoi » sach doi, sach moi, cach thoi
khoa hoc » hoa hoc
cau nhan » chau nhan, ca nhan, cam nhan
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
cu nhan » ca nhan
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: "thuoc sach hoi trac, nghien cuu mon hoc doanh khoa hoc xa hoi ((cau nhan) OR (cu nhan)) tai~".
• Adding a wildcard symbol may retrieve word variants: thuoc sach hoi trac, nghien cuu mon hoc doanh khoa hoc xa hoi ((cau nhan) OR (cu nhan)) tai*.