Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
duong cuoc » luong cuoc, huong cuoc, duong nguoc
nganh khoa » nganh hoa, nganh khong, doanh khoa
cac duong » cau duong, cac tuong, cac dong
khanh hoa » thanh hoa, hang hoa
sach hoi » sach doi, sach moi, cach thoi
phan van » pham van, thanh van, luan van
bo sach » co sach, hoc sach
hoi tap » hoi dap, hoc tap, hoi tai
va phan » van phan, va phat, va phap
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach hoi tap, nghien cac duong cuoc ((nganh khoa) or (khanh hoa)) hoc xa hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach hoi tap, nghien cac duong cuoc ((nganh khoa) OR (khanh hoa)) hoc xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: bo sach hoi tap, nghien cac duong cuoc ((nganh khoa) or (khanh hoa)) hoc xa hoi va phan van*.