Perhaps you should try some spelling variations:
phat xuat » phan xuat, pham xuat, phap luat
doc sach » hoc sach, toc sach, nuoc sach
phat xuc » chat xuc, phap xu, phat huy
sach thi » sach thu, sach tai, sach thieu
cau treo » cau theo, cau tren, cau triet
hang ca » hang va, nang cao, hang tai
hang xa » hoang xa, hang va, lang xa
van anh » van thanh, tuan anh, van minh
hieu va » lieu va, hieu qua
anh vi » hanh vi, anh va, anh ve
vi cau » va cau, ve cau, di cau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach thi ((hang xa) OR (hang ca)) hoi. hieu va ((phat xuc) OR (phat xuat)) van anh vi cau treo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach thi ((hang xa) or (hang ca)) hoi. hieu va ((phat xuc) OR (phat xuat)) van anh vi cau treo~".
• Adding a wildcard symbol may retrieve word variants: doc sach thi ((hang xa) or (hang ca)) hoi. hieu va ((phat xuc) OR (phat xuat)) van anh vi cau treo*.