Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
sach duoc » sach nuoc, sach dao, sach dung
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
xa nhan » ca nhan, va nhan, xa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach duoc) or (mach hoc)) tap, nghien cuu mon hoc nganh khoa hoc ma hoa xa nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duoc) OR (mach hoc)) tap, nghien cuu mon hoc nganh khoa hoc ma hoa xa nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duoc) or (mach hoc)) tap, nghien cuu mon hoc nganh khoa hoc ma hoa xa nhan tai*.