Perhaps you should try some spelling variations:
doanh khang » doanh nhan, danh thang, doanh chung
khang thuoc » khong thuoc, dang thuoc, hanh thuoc
nghien cua » nghien cuu, nghiep cua, nghiep vua
hoa doanh » toan doanh, hoa dan
cach hoc » cach thuc, cach thoi, dich hoc
cong hoa » dong hoa, dong hoc, hang hoa
thuoc xa » thuoc ma, thuoc va, thuoc la
tu cach » tu cac
va nhan » van nhan, ca nhan, va nha
va phan » van phan, va phat, va phap

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

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