Perhaps you should try some spelling variations:
thanh tay » thanh tai, thanh toan, thanh thuy
thuat hoa » thuat toan, thuyet hoa, thuat do
thanh ky » hanh ky, than ky, thanh huy
sach han » sach tham, sach danh, sach nang
su sach » so sach, vu sach
tu ban » thu ban, te ban
han ky » hanh ky, than ky, nhan ky

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

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