Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hieu tuc » hieu thuc, hieu luc, hieu thuoc
dong hoa » dong hoc, dong co
van tien » toan tien, van hieu, van tuan
cham xuc » cam xuc, chat xuc, cham soc
van chi » van chien, luan chi, van chat
xuc ban » duc ban, cuc ban, quoc ban
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu tu » chieu tu, hien tu, lieu tu
hoa hoi » khoa hoi, hoa hoc, hoa doi
ky dong » ly dong, ky dang, ky cong

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 hoa hoi. ((hieu tu) OR (hieu tuc)) cham xuc ban thanh ((van tien) or (van chi)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky dong hoa hoi. ((hieu tu) OR (hieu tuc)) cham xuc ban thanh ((van tien) OR (van chi)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky dong hoa hoi. ((hieu tu) OR (hieu tuc)) cham xuc ban thanh ((van tien) or (van chi)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ky dong hoa hoi. ((hieu tu) OR (hieu tuc)) cham xuc ban thanh ((van tien) or (van chi)) tre*.