Perhaps you should try some spelling variations:
doc sach » toc sach, nuoc sach, dac sac
cham xuc » cam xuc, chat xuc, pham duc
hoc sach » hoc sinh, hoc cac, hoc anh
thi hong » thi cong, thi phuong, thi hanh
van anh » van thanh, tuan anh, van minh
hieu va » lieu va, hieu qua
hong xa » hoang xa, phong xa, hmong xa
cua tre » cua te, cuu tre, cua triet
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (hoc sach)) thi hong xa hoi. hieu va ((cham xuc) OR (cham soc)) van anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (hoc sach)) thi hong xa hoi. hieu va ((cham xuc) OR (cham soc)) van anh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc sach) or (hoc sach)) thi hong xa hoi. hieu va ((cham xuc) OR (cham soc)) van anh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (hoc sach)) thi hong xa hoi. hieu va ((cham xuc) OR (cham soc)) van anh vi cua tre*.