Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nganh » hoc nhanh
chung hoc » trung hoc, dung hoc, hung hoa
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
cong hoc » dong hoc, cong hoa, cong coc
hung hoc » khung hoc, nhung hoc, dung hoc
hoi ban » hoi dan, hoi bai, doi ban
tim » time

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

• Performing a fuzzy search may retrieve terms with similar spellings: tim mach hoc tap, nghien thu cong hoc nganh ((hung hoc) OR (chung hoc)) xa hoi ban thanh van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tim mach hoc tap, nghien thu cong hoc nganh ((hung hoc) OR (chung hoc)) xa hoi ban thanh van".
• Adding a wildcard symbol may retrieve word variants: tim mach hoc tap, nghien thu cong hoc nganh ((hung hoc) OR (chung hoc)) xa hoi ban thanh van*.