Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
thu luong » thu huong, thu tuong, phu luong
thoi khac » tho nhac, hoc khac, khoa khac
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
hoi khau » hoi chu, hoi khoa, hoi nhap
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) OR (thoi khac)) 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) OR (thoi khac)) luan van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien thu luong ha thanh cong hoa xa ((hoi khau) OR (thoi khac)) luan van*.