Perhaps you should try some spelling variations:
cuu luong » cuu long, cu luong, cuu tuong
luong hoc » duong hoc, tuong hoc, luong hoa
hoc thanh » hoc nhanh, hoan thanh, hoc phan
khau luan » khoa luan, phap luan, pham luan
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
cong hoa » dong hoa, dong hoc, hang hoa
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: tu ((sach hoc) or (sach hoi)) tap, nghien cuu luong hoc thanh cong hoa xa hoi khau luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (sach hoi)) tap, nghien cuu luong hoc thanh cong hoa xa hoi khau luan van.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (sach hoi)) tap, nghien cuu luong hoc thanh cong hoa xa hoi khau luan van*.