Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
kxy thuat » ky thuat, ki thuat, ky thua
thu sach » tu sach, thuat sach, thu hoach
my thuat » ky thuat, ki thuat, va thuat
thuat co » thuat do, thuat o
ngan my » nhan my, nganh ma, nganh ky
tu canh » thu canh, tu chanh, tu can
tranh » trinh, thanh, tran
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: (( ((thu sach) OR (thuoc sach)) ngan my thuat co hoc ) or ( tu canh tranh kxy thuat toan khoa ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((thu sach) OR (thuoc sach)) ngan my thuat co hoc ) OR ( tu canh tranh kxy thuat toan khoa ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((thu sach) OR (thuoc sach)) ngan my thuat co hoc ) or ( tu canh tranh kxy thuat toan khoa ))*".