Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
thong hoc » thuong hoc, tuong hoc, thong hoa
bai thanh » ban thanh, tai thanh, mai thanh
tong hoc » tuong hoc, trong hoc, tong hop
khoa hoc » hoa hoc
tu bach » vu bach, tu cach, tu bac
mai tap » bai tap, mai tat, mai tan
hoi bai » hoc bai, hoi tai, khoi bay
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 bach mai tap, nghien cuu ((tong hoc) OR (thong hoc)) nganh khoa hoc xa hoi bai thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu bach mai tap, nghien cuu ((tong hoc) OR (thong hoc)) nganh khoa hoc xa hoi bai thanh san".
• Adding a wildcard symbol may retrieve word variants: tu bach mai tap, nghien cuu ((tong hoc) OR (thong hoc)) nganh khoa hoc xa hoi bai thanh san*.