Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nguoi sach » nguoi san, nuoc sach
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh khoa » nganh hoa, doanh khoa, anh khoa
sach thoi » cach thoi, sach hoi, sach tham
thoi dai » hoc dai, hoi dap, hoi dan
huu toan » huu tuan, cuu toan, huy toan
toan hoc » toan khoa, van hoc, hoa hoc
van luan » van quan, van tuan, von luan
hai van » thai van, ha van, hai tan
ma hai » ta hai, va hai, xa hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: nguoi sach thoi dai, nghien huu toan hoc ((nganh khoa) OR (nganh khong)) hoc ma hai van luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nguoi sach thoi dai, nghien huu toan hoc ((nganh khoa) OR (nganh khong)) hoc ma hai van luan van".
• Adding a wildcard symbol may retrieve word variants: nguoi sach thoi dai, nghien huu toan hoc ((nganh khoa) OR (nganh khong)) hoc ma hai van luan van*.