Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
thanh hang » thanh hoang, thanh thang, tranh hang
thu luong » thu huong, thu tuong, phu luong
luong hoa » luong khoa, luong hoai, luong ha
hoa thanh » hoan thanh, ha thanh, hoc thanh
khau luan » khoa luan, phap luan
pham luan » phap luan, pham quang, pham van
sach hoc » cach hoc, sach hoi, mach hoc
hang hoa » hang khoa, thanh hoa, hang va
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 hoa thanh hang 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 hoa thanh hang hoa xa hoi ((khau luan) OR (pham luan)) van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien thu luong hoa thanh hang hoa xa hoi ((khau luan) OR (pham luan)) van*.