Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh ve » hanh ve, thanh va, thanh vien
cham xuc » cam xuc, chat xuc, pham duc
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
hieu tu » chieu tu, hieu tuc, hien tu
hoa hoi » khoa hoi, hoa doi, hoc hoi
ky dong » ly dong, ky dang, ky cong
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua

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