Perhaps you should try some spelling variations:
coc nganh » hoc nganh, cac nganh, chuc nganh
hoc nhanh » hoc nganh, hoc phan
khong hoc » khung hoc, thong hoc, khong thuoc
hoang van » hang va
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
ma hoang » mai hoang, m hoang, van hoang
van gian » van giang, dan gian, van giao
gian dan » gian lang
tu mach » tu cach, tu manh, tu hach

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu mach hoc tap, nghien cuu cong ((coc nganh) or (hoc nhanh)) khong hoc ma hoang van gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu cong ((coc nganh) OR (hoc nhanh)) khong hoc ma hoang van gian dan.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu cong ((coc nganh) or (hoc nhanh)) khong hoc ma hoang van gian dan*.