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
sach hoc » sach hoi, mach hoc, sach duoc
cach hoc » cach thuc, cach thoi, dich hoc
hang hoa » hang khoa, thanh hoa, hang va
hoi khau » thoi khac, hoi chu, hoi khoa

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