Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
mach hoc » cach hoc, dich hoc, anh hoc
sach hoi » sach doi, sach moi, cach thoi
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
dap phan » dam phan, dap phap, cap phan
phan dau » phan tu, hang dau
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: vu ((mach hoc) or (sach hoi)) tap, nghien cuu tong hoc nganh hoa hoc xa hoi dap phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((mach hoc) OR (sach hoi)) tap, nghien cuu tong hoc nganh hoa hoc xa hoi dap phan dau.
• Adding a wildcard symbol may retrieve word variants: vu ((mach hoc) or (sach hoi)) tap, nghien cuu tong hoc nganh hoa hoc xa hoi dap phan dau*.