Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
thu luong » thu huong, thu tuong, phu luong
khau luan » khoa luan, phap luan
pham luan » phap luan, pham quang, pham van
sach hoc » cach hoc, sach hoi, mach hoc
luong ha » luong va, long ha, luong khoa
ha thanh » va thanh, pham thanh, phan thanh
cong hoa » dong hoa, dong hoc, hang hoa
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 thu luong ha thanh cong hoa xa hoi ((khau luan) OR (pham luan)) van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoc tap, nghien thu luong ha thanh cong hoa xa hoi ((khau luan) OR (pham luan)) van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien thu luong ha thanh cong hoa xa hoi ((khau luan) OR (pham luan)) van*.