Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
khong thuc » khong chuc, phong thuc, thuong thuc
hoc nganh » hoc nhanh
kon mach » ke mach, ban mach
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
phan dau » phan tu, hang dau
ca phan » cac phan, cao phan, cap phan
va hoi » xa hoi, va hoc, va hoa
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: kon mach hoc tap, nghien cuu dong hoc nganh ((khong thuc) OR (khong thuoc)) va hoi ca phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "kon mach hoc tap, nghien cuu dong hoc nganh ((khong thuc) OR (khong thuoc)) va hoi ca phan dau".
• Adding a wildcard symbol may retrieve word variants: kon mach hoc tap, nghien cuu dong hoc nganh ((khong thuc) OR (khong thuoc)) va hoi ca phan dau*.