Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
cong luat » cong suat, cong luan, cuong luan
hanh hoc » thanh hoc, hinh hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
hoan hoc » hoa hoc, toan hoc, hoang hoa
mai khoi » mai khoa, tai khoa, cac khoi
nhan van » nhan dan, nhan va, phan van
tu hanh » du hanh, lu hanh, thuc hanh
mai hoi » dai hoi, lai hoi, mai doi
va nhan » van nhan, ca nhan, va phan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu hanh hoc tap, nghien cuu cong luat doanh hoan hoc ((mai hoi) OR (mai khoi)) va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu hanh hoc tap, nghien cuu cong luat doanh hoan hoc ((mai hoi) OR (mai khoi)) va nhan van".
• Adding a wildcard symbol may retrieve word variants: tu hanh hoc tap, nghien cuu cong luat doanh hoan hoc ((mai hoi) OR (mai khoi)) va nhan van*.