Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
thanh hoa » thanh pho
sach hoi » sach doi, sach moi, cach thoi
cau luan » cu luan, dau luan, lau luan
su sach » so sach, vu sach
van hoc » van hoa
hoi cau » hoi chu, hoc cau, hoa cau
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: su sach hoi dap, nghien cuu van hoc ((nganh khoa) or (thanh hoa)) hoc xa hoi cau luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi dap, nghien cuu van hoc ((nganh khoa) OR (thanh hoa)) hoc xa hoi cau luan van.
• Adding a wildcard symbol may retrieve word variants: su sach hoi dap, nghien cuu van hoc ((nganh khoa) or (thanh hoa)) hoc xa hoi cau luan van*.