Perhaps you should try some spelling variations:
sach tranh » canh tranh
hoc nganh » hoc nhanh
xay thuat » ky thuat, va thuat, cac thuat
tranh thu » tran thu, thanh thu, thanh thuy
thu thuat » phau thuat, thu hut
thuat hoa » thuat toan, thuyet hoa, thuat do
my thuat » ky thuat, ki thuat, va thuat
toan hoc » toan khoa, van hoc, tin hoc
tu sach » thu sach, su sach, te sach
tu hoc » te hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu hoc nganh ((xay thuat) OR (my thuat)) toan hoc ) or ( tu sach tranh thu thuat hoa hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu hoc nganh ((xay thuat) OR (my thuat)) toan hoc ) OR ( tu sach tranh thu thuat hoa hoc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu hoc nganh ((xay thuat) OR (my thuat)) toan hoc ) or ( tu sach tranh thu thuat hoa hoc ))*".