Perhaps you should try some spelling variations:
sach tranh » canh tranh
tranh xay » trinh xay, trong xay, manh xay
xay thuat » my thuat, va thuat, cac thuat
thuat van » thuat san, thuat va, thuat ban
thuat hoa » thuat toan, thuyet hoa, thuat do
hoc sach » hoc sinh, hoc cac, hoc anh
tranh ky » trinh ky, thanh ky, hanh ky
su sach » so sach, vu sach
van hoc » van hoa

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 tranh xay thuat van hoc ) or ( hoc sach tranh ky thuat hoa hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tranh xay thuat van hoc ) OR ( hoc sach tranh ky thuat hoa hoc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tranh xay thuat van hoc ) or ( hoc sach tranh ky thuat hoa hoc ))*.