Perhaps you should try some spelling variations:
nghien cu » nghien cuu, nghiep cua, nghiep cau
luong thi » luong tai
thi nganh » thi ngan, khoi nganh, tai ngan
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
cu luong » cat luong, huy luong, do luong
va thanh » gia thanh, ban thanh, va tinh
su sach » so sach, vu sach

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 hoc tap, nghien cu luong thi nganh ((khoa hoc) OR (hoa hoc)) xa hoi va thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoc tap, nghien cu luong thi nganh ((khoa hoc) OR (hoa hoc)) xa hoi va thanh van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cu luong thi nganh ((khoa hoc) OR (hoa hoc)) xa hoi va thanh van*.