Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong hoc » khung hoc, thong hoc, khong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
hang dau » hang va, hang tai
tu mach » tu cach, tu manh, tu hach
mon hoc » toan hoc, dong hoc
va hang » van hang, va nang, va lang
hoc xa » hoc ma
dong » cong, dung

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 ((mon hoc) or (dong co)) nganh khong hoc xa hoi va hang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu ((mon hoc) OR (dong co)) nganh khong hoc xa hoi va hang dau.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu ((mon hoc) or (dong co)) nganh khong hoc xa hoi va hang dau*.