Perhaps you should try some spelling variations:
dong khoa » duong khoa, dung khoa, dong hoa
ban thanh » ban hanh, ban hang
khoa hoc » hoa hoc
khien tu » dien tu
cham xuc » cam xuc, chat xuc, pham duc
thanh va » thanh van, hanh va, thanh ha
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
ky dong » ly dong, ky dang, ky cong
va cua » va chua, via cua, ca cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky dong khoa hoc. khien tu ((cham xuc) OR (cham soc)) ban thanh va cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dong khoa hoc. khien tu ((cham xuc) OR (cham soc)) ban thanh va cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky dong khoa hoc. khien tu ((cham xuc) OR (cham soc)) ban thanh va cua te*.