Perhaps you should try some spelling variations:
nganh nang » nganh nong, ganh nang, ngan hang
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, sach duoc
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
nang hoc » nang doc, nang luc, hang hoa
cua nhan » ca nhan, cua ngan, cua nha
nhan tai » hang tai, van tai, toan tai
hoi cua » hoi chuc
ma hoi » mai hoi, xa hoi, ma hoa

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 hoc) or (mach hoc)) tai, nghien cuu dong hoc nganh nang hoc ma hoi cua nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoc) OR (mach hoc)) tai, nghien cuu dong hoc nganh nang hoc ma hoi cua nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoc) or (mach hoc)) tai, nghien cuu dong hoc nganh nang hoc ma hoi cua nhan tai*.