Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
kon mach » ke mach, ban mach
mach hoc » cach hoc, dich hoc, anh hoc
cong hoc » cong hoa, cong coc, cong ho
dong hoc » dong co, dong luc
thuoc va » thuc va, thuoc ma, thuong va
nhan tai » hang tai, van tai, toan tai
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 ((cong hoc) OR (dong hoc)) nganh khong thuoc va hoi ca nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "kon mach hoc tap, nghien cuu ((cong hoc) OR (dong hoc)) nganh khong thuoc va hoi ca nhan tai".
• Adding a wildcard symbol may retrieve word variants: kon mach hoc tap, nghien cuu ((cong hoc) OR (dong hoc)) nganh khong thuoc va hoi ca nhan tai*.