Perhaps you should try some spelling variations:
sach nganh » sach ngan, sach tranh, cac nganh
canh trinh » canh tranh, hanh trinh, canh tinh
trinh kxy » trinh ky, trinh ly, trinh ke
kxy thuat » ky thuat, ki thuat, my thuat
nganh va » nganh vat, nganh ma, nhanh va
va thuat » ky thuat, ki thuat, va thuc
thuat do » thuat o
tu sach » thu sach, su sach, te sach
tu canh » thu canh, tu chanh, tu can
do hoc » co hoc, do hoa, du hoc
toan » tran

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach nganh va thuat do hoc ) or ( tu canh trinh kxy thuat toan khoa ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach nganh va thuat do hoc ) OR ( tu canh trinh kxy thuat toan khoa ))*.