Perhaps you should try some spelling variations:
khang khoa » hang khoa, khang kho, khong khoa
khoa nganh » khoi nganh, hoc nganh
cuu khang » huu khang, cuu nang, cuu thanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
mach hoc » cach hoc, dich hoc, anh hoc
van nhan » van phan, van thanh, danh nhan
tu mach » tu cach, tu manh, tu hach
va nhan » ca nhan, va phan, va nha
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu khang khoa nganh hoa hoc xa hoi ((va nhan) or (van nhan)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu khang khoa nganh hoa hoc xa hoi ((va nhan) OR (van nhan)) van.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu khang khoa nganh hoa hoc xa hoi ((va nhan) or (van nhan)) van*.