Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
mach hoc » cach hoc, dich hoc, anh hoc
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
khoa hoc » hoa hoc
bai choi » tai chi, bai hoc, bi cho
choi dan » hoi dan, hoa dan, hoc dan
phan van » thanh van, luan van, tran van
te mach » ke mach, te sach, tim mach
hoc bai » hoc dai, hoc giai

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

• Performing a fuzzy search may retrieve terms with similar spellings: te mach hoc tap, nghien cuu tong hoc nganh khoa hoc bai choi dan ((phan van) or (pham van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te mach hoc tap, nghien cuu tong hoc nganh khoa hoc bai choi dan ((phan van) OR (pham van)).
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cuu tong hoc nganh khoa hoc bai choi dan ((phan van) or (pham van))*.