Perhaps you should try some spelling variations:
doanh hoan » doanh doanh, doanh khoa, doanh nhan
cong luat » cong suat, cong luan, cuong luan
cuu cong » cua cong, thu cong, cac cong
hoan hoc » hoa hoc, toan hoc, hoang hoa
nhan van » nhan dan, nhan va, phan van
tu hanh » du hanh, lu hanh, thi hanh
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
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) OR (thuc hanh)) hoc tap, nghien cuu cong luat doanh hoan hoc mai hoi va nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu hanh) OR (thuc hanh)) hoc tap, nghien cuu cong luat doanh hoan hoc mai hoi va nhan van".
• Adding a wildcard symbol may retrieve word variants: ((tu hanh) OR (thuc hanh)) hoc tap, nghien cuu cong luat doanh hoan hoc mai hoi va nhan van*.