Perhaps you should try some spelling variations:
nganh hoa » thanh hoa, khanh hoa, danh hoa
mach hoc » cach hoc, dich hoc, anh hoc
dong hoc » dong co, dong luc
phan dan » phan dang, phan dau, nhan dan
tu mach » tu cach, tu manh, tu hach
mon hoc » toan hoc
va phan » van phan, va phat, va phap
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: tu mach hoc tap, nghien cuu ((mon hoc) or (dong hoc)) nganh hoa hoc xa hoi va phan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu mach hoc tap, nghien cuu ((mon hoc) OR (dong hoc)) nganh hoa hoc xa hoi va phan dan.
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu ((mon hoc) or (dong hoc)) nganh hoa hoc xa hoi va phan dan*.