Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh dung » ngan dung, anh dung, nganh cong
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
cong hoc » dong hoc, cong hoa, cong coc
dung hoc » dong hoc, dung thuoc, trung hoc
dan hanh » dang hanh, dan khanh, dan thanh
hanh van » thanh van, khanh van, hanh va
hoi dan » hoa dan, hoc dan, hoi dap
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: (tim or time) mach hoc tap, nghien thu cong hoc nganh dung hoc xa hoi dan hanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (tim OR time) mach hoc tap, nghien thu cong hoc nganh dung hoc xa hoi dan hanh van.
• Adding a wildcard symbol may retrieve word variants: (tim or time) mach hoc tap, nghien thu cong hoc nganh dung hoc xa hoi dan hanh van*.