Perhaps you should try some spelling variations:
nganh tuong » nganh cong, manh tuong, nganh nong
tuong hoc » truong hoc, tuong ho, duong hoc
sach hoc » cach hoc, sach hoi, mach hoc
van pham » san pham, van phan, van phat
su sach » so sach, vu sach
mot hoc » mon hoc, mot goc, bot hoc
hai van » thai van, ha van, hai tan
mo hoc » mon hoc, co hoc
hoc ta » hoc tai, hoc tan, hoc tam
ta hai » tai hai, tac hai, tra hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoc tap, nghien cuu ((mot hoc) OR (mo hoc)) nganh tuong hoc ta hai van pham van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach hoc tap, nghien cuu ((mot hoc) OR (mo hoc)) nganh tuong hoc ta hai van pham van".
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cuu ((mot hoc) OR (mo hoc)) nganh tuong hoc ta hai van pham van*.