Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
luong cuoc » trong cuoc
nganh khoa » nganh hoa, nganh khong, doanh khoa
cac luong » cat luong, cac tuong, cac duong
khanh hoa » thanh hoa, hang hoa
sach hoc » cach hoc, sach hoi, mach hoc
phan van » pham van, thanh van, luan van
bo sach » co sach, hoc sach
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 hoc tap, nghien cac luong 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 hoc tap, nghien cac luong cuoc ((nganh khoa) OR (khanh hoa)) hoc xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: bo sach hoc tap, nghien cac luong cuoc ((nganh khoa) or (khanh hoa)) hoc xa hoi va phan van*.