Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
thanh van » thanh san, thanh toan, thanh phan
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
ta thanh » tai thanh, va thanh, ha thanh
nhan dan » phan dau, gian dan, nhan tai
nhan va » nhan tai, nhan tao, phan van
mo hoc » mon hoc, co hoc
hoc ta » hoc tai, hoc tan, hoc tam

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoc tap, nghien cuu mo hoc nganh khoa hoc ta thanh van ((nhan dan) or (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, nghien cuu mo hoc nganh khoa hoc ta thanh van ((nhan dan) OR (nhan va))*.