Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
dau tien » van tien
cay mang » cach mang, cay mac, cay cong
hieu va » lieu va, hieu qua
van anh » van thanh, tuan anh, van minh
cac xuc » cam xuc, chat xuc, cac cuoc
anh vi » hanh vi, anh va, anh ve
vi dau » vi dai, va dau, bi dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ((y mang) OR (cay mang)) xa hoi. hieu va ((cac xuc) or (cac nuoc)) van anh vi dau tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y mang) OR (cay mang)) xa hoi. hieu va ((cac xuc) OR (cac nuoc)) van anh vi dau tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((y mang) OR (cay mang)) xa hoi. hieu va ((cac xuc) or (cac nuoc)) van anh vi dau tien".
• Adding a wildcard symbol may retrieve word variants: thu sach ((y mang) OR (cay mang)) xa hoi. hieu va ((cac xuc) or (cac nuoc)) van anh vi dau tien*.